diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9bfb0e4..29c869e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -39,7 +39,8 @@ install( FILES
     tqdbuserror.h tqdbusmessage.h tqdbusconnection.h
     tqdbusvariant.h tqdbusobject.h tqdbusproxy.h
     tqdbusmacros.h tqdbusdata.h tqdbusdatalist.h
-    tqdbusdatamap.h tqdbusobjectpath.h tqdbusdataconverter.h
+    tqdbusdatamap.h tqdbusobjectpath.h tqdbusunixfd.h
+    tqdbusdataconverter.h
   DESTINATION ${INCLUDE_INSTALL_DIR} )
 
 
@@ -84,7 +85,8 @@ tde_add_library( dbus-1-tqt SHARED AUTOMOC
     tqdbusconnection.cpp tqdbuserror.cpp tqdbusintegrator.cpp
     tqdbusmarshall.cpp tqdbusmessage.cpp tqdbusserver.cpp
     tqdbusproxy.cpp tqdbusdata.cpp tqdbusdatalist.cpp
-    tqdbusobjectpath.cpp tqdbusdataconverter.cpp
+    tqdbusobjectpath.cpp tqdbusunixfd.cpp
+    tqdbusdataconverter.cpp
   VERSION 0.0.0
   LINK ${TQT_LIBRARIES} ${DBUS_LIBRARIES}
   DESTINATION ${LIB_INSTALL_DIR}
diff --git a/tools/dbusxml2qt3/methodgen.cpp b/tools/dbusxml2qt3/methodgen.cpp
index 8fe0741..ad3bc47 100644
--- a/tools/dbusxml2qt3/methodgen.cpp
+++ b/tools/dbusxml2qt3/methodgen.cpp
@@ -105,6 +105,15 @@ static bool parseDBusSignature(const TQString& signature, Argument& argument)
             argument.forwardDeclarations.append("class TQT_DBusObjectPath");
             argument.sourceIncludes["tqdbus"].append("<tqdbusobjectpath.h>");
         }
+        else if (signature == "h")
+        {
+            argument.signature = "TQT_DBuxUnixFd";
+            argument.accessor = "UnixFd";
+            argument.isPrimitive = false;
+
+            argument.forwardDeclarations.append("class TQT_DBusUnixFd");
+            argument.sourceIncludes["tqdbus"].append("<tqdbusunixfd.h>");
+        }
         else if (signature == "v")
         {
             argument.signature = "TQT_DBusVariant";
diff --git a/tqdbusdata.cpp b/tqdbusdata.cpp
index 26ca154..5a6cfa9 100644
--- a/tqdbusdata.cpp
+++ b/tqdbusdata.cpp
@@ -27,6 +27,7 @@
 #include "tqdbusdatalist.h"
 #include "tqdbusdatamap.h"
 #include "tqdbusobjectpath.h"
+#include "tqdbusunixfd.h"
 #include "tqdbusvariant.h"
 
 #include <tqshared.h>
@@ -50,6 +51,10 @@ public:
                 delete (TQT_DBusObjectPath*)value.pointer;
                 break;
 
+            case TQT_DBusData::UnixFd:
+                delete (TQT_DBusUnixFd*)value.pointer;
+                break;
+
             case TQT_DBusData::List:
                 delete (TQT_DBusDataList*)value.pointer;
                 break;
@@ -101,6 +106,10 @@ public:
                         delete (TQT_DBusDataMap<TQT_DBusObjectPath>*)value.pointer;
                         break;
 
+                    case TQT_DBusData::UnixFd:
+                        delete (TQT_DBusDataMap<TQT_DBusUnixFd>*)value.pointer;
+                        break;
+
                     default:
                         tqFatal("TQT_DBusData::Private: unhandled map key type %d(%s)",
                                keyType, TQT_DBusData::typeName(keyType));
@@ -208,6 +217,9 @@ bool TQT_DBusData::operator==(const TQT_DBusData& other) const
             case TQT_DBusData::ObjectPath:
                 return toObjectPath() == other.toObjectPath();
 
+            case TQT_DBusData::UnixFd:
+                return toUnixFd() == other.toUnixFd();
+
             case TQT_DBusData::List:
                 return toList() == other.toList();
 
@@ -257,6 +269,10 @@ bool TQT_DBusData::operator==(const TQT_DBusData& other) const
                         toObjectPathKeyMap() == other.toObjectPathKeyMap();
                         break;
 
+                    case TQT_DBusData::UnixFd:
+                        toUnixFdKeyMap() == other.toUnixFdKeyMap();
+                        break;
+
                     default:
                         tqFatal("TQT_DBusData operator== unhandled map key type %d(%s)",
                                d->keyType, TQT_DBusData::typeName(d->keyType));
@@ -303,6 +319,7 @@ const char* TQT_DBusData::typeName(Type type)
         case TQT_DBusData::Double:     return "Double";
         case TQT_DBusData::String:     return "String";
         case TQT_DBusData::ObjectPath: return "ObjectPath";
+        case TQT_DBusData::UnixFd:     return "UnixFd";
         case TQT_DBusData::List:       return "List";
         case TQT_DBusData::Struct:     return "Struct";
         case TQT_DBusData::Variant:    return "Variant";
@@ -568,6 +585,32 @@ TQT_DBusObjectPath TQT_DBusData::toObjectPath(bool* ok) const
     return *((TQT_DBusObjectPath*)d->value.pointer);
 }
 
+TQT_DBusData TQT_DBusData::fromUnixFd(const TQT_DBusUnixFd& value)
+{
+    TQT_DBusData data;
+
+    if (value.isValid())
+    {
+        data.d->type = TQT_DBusData::UnixFd;
+        data.d->value.pointer = new TQT_DBusUnixFd(value);
+    }
+
+    return data;
+}
+
+TQT_DBusUnixFd TQT_DBusData::toUnixFd(bool* ok) const
+{
+    if (d->type != TQT_DBusData::UnixFd)
+    {
+        if (ok != 0) *ok = false;
+        return TQT_DBusUnixFd();
+    }
+
+    if (ok != 0) *ok = true;
+
+    return *((TQT_DBusUnixFd*)d->value.pointer);
+}
+
 TQT_DBusData TQT_DBusData::fromList(const TQT_DBusDataList& list)
 {
     TQT_DBusData data;
@@ -885,6 +928,31 @@ TQT_DBusDataMap<TQT_DBusObjectPath> TQT_DBusData::toObjectPathKeyMap(bool* ok) c
     return *((TQT_DBusDataMap<TQT_DBusObjectPath>*)d->value.pointer);
 }
 
+TQT_DBusData TQT_DBusData::fromUnixFdKeyMap(const TQT_DBusDataMap<TQT_DBusUnixFd>& map)
+{
+    TQT_DBusData data;
+
+    data.d->type = TQT_DBusData::Map;
+    data.d->keyType = map.keyType();
+    data.d->value.pointer = new TQT_DBusDataMap<TQT_DBusUnixFd>(map);
+
+    return data;
+}
+
+TQT_DBusDataMap<TQT_DBusUnixFd> TQT_DBusData::toUnixFdKeyMap(bool* ok) const
+{
+    if (d->type != TQT_DBusData::Map &&
+        d->keyType != TQT_DBusDataMap<TQT_DBusUnixFd>::m_keyType)
+    {
+        if (ok != 0) *ok = false;
+        return TQT_DBusDataMap<TQT_DBusUnixFd>();
+    }
+
+    if (ok != 0) *ok = true;
+
+    return *((TQT_DBusDataMap<TQT_DBusUnixFd>*)d->value.pointer);
+}
+
 static const char* qDBusTypeForTQT_DBusType(TQT_DBusData::Type type)
 {
     switch (type)
@@ -913,6 +981,8 @@ static const char* qDBusTypeForTQT_DBusType(TQT_DBusData::Type type)
             return DBUS_TYPE_STRING_AS_STRING;
         case TQT_DBusData::ObjectPath:
             return DBUS_TYPE_OBJECT_PATH_AS_STRING;
+        case TQT_DBusData::UnixFd:
+            return DBUS_TYPE_UNIX_FD_AS_STRING;
         case TQT_DBusData::Variant:
             return DBUS_TYPE_VARIANT_AS_STRING;
         default:
@@ -1008,6 +1078,10 @@ TQCString TQT_DBusData::buildDBusSignature() const
                     signature += qDBusSignatureForMapValue<TQT_DBusObjectPath>(
                         *((TQT_DBusDataMap<TQT_DBusObjectPath>*) d->value.pointer));
                     break;
+                case TQT_DBusData::UnixFd:
+                    signature += qDBusSignatureForMapValue<TQT_DBusUnixFd>(
+                        *((TQT_DBusDataMap<TQT_DBusUnixFd>*) d->value.pointer));
+                    break;
                 default:
                     break;
             }
@@ -1052,3 +1126,6 @@ const TQT_DBusData::Type TQT_DBusDataMap<TQString>::m_keyType = TQT_DBusData::St
 template <>
 const TQT_DBusData::Type TQT_DBusDataMap<TQT_DBusObjectPath>::m_keyType =
         TQT_DBusData::ObjectPath;
+
+template <>
+const TQT_DBusData::Type TQT_DBusDataMap<TQT_DBusUnixFd>::m_keyType = TQT_DBusData::UnixFd;
diff --git a/tqdbusdata.h b/tqdbusdata.h
index b3f5927..ae64706 100644
--- a/tqdbusdata.h
+++ b/tqdbusdata.h
@@ -31,6 +31,7 @@ class TQCString;
 class TQT_DBusDataList;
 class TQT_DBusVariant;
 class TQT_DBusObjectPath;
+class TQT_DBusUnixFd;
 class TQString;
 
 template<typename T> class TQValueList;
@@ -171,6 +172,13 @@ public:
          */
         ObjectPath,
 
+        /**
+         * Type when encapsulating a D-Bus unix file handle.
+         *
+         * @see fromUnixFd(), toUnixFd()
+         */
+        UnixFd,
+
         /**
          * Type when encapsulating a list of values.
          *
@@ -254,6 +262,7 @@ public:
          * - #UInt64
          * - #String
          * - #ObjectPath
+         * - #UnixFd
          *
          * All values need to be of the same type.
          *
@@ -266,6 +275,7 @@ public:
          * @see fromUInt64KeyMap(), toUInt64KeyMap()
          * @see fromStringKeyMap(), toStringKeyMap()
          * @see fromObjectPathKeyMap(), toObjectPathKeyMap()
+         * @see fromUnixFdKeyMap(), toUnixFdKeyMap()
          */
         Map
     };
@@ -684,6 +694,34 @@ public:
      */
     TQT_DBusObjectPath toObjectPath(bool* ok = 0) const;
 
+    /**
+     * @brief Creates a data object for the given unix file handle @p value
+     *
+     * @param value the value to encapsulate
+     *
+     * @return a data object of type #UnixFd containing the @p value
+     *
+     * @see toUnixFd()
+     */
+    static TQT_DBusData fromUnixFd(const TQT_DBusUnixFd& value);
+
+    /**
+     * @brief Tries to get the encapsulated unix file handle value
+     *
+     * If the data object is not of type #UnixFd this will fail, i.e.
+     * the parameter @p ok will be set to @c false if present.
+     *
+     * @param ok optional pointer to a bool variable to store the
+     *        success information in, i.e. will be set to @c true on success
+     *        and to @c false if the conversion failed (not of type #UnixFd)
+     *
+     * @return the encapsulated object path value or an empty and invalid object
+     *         if it fails
+     *
+     * @see fromUnixFd()
+     */
+    TQT_DBusUnixFd toUnixFd(bool* ok = 0) const;
+
     /**
      * @brief Creates a data object for the given @p list
      *
@@ -1128,6 +1166,41 @@ public:
      */
     TQT_DBusDataMap<TQT_DBusObjectPath> toObjectPathKeyMap(bool* ok = 0) const;
 
+    /**
+     * @brief Creates a data object for the given @p map
+     *
+     * \note The map is allowed to be empty but is required to have a valid
+     *       value type
+     *
+     * The resulting data object will have the keyType() set to #UnixFd.
+     *
+     * @param map the map to encapsulate
+     *
+     * @return a data object of type #Map containing the @p map or
+     *         an #Invalid object if the map's value type is #Invalid
+     *
+     * @see toUnixFdhKeyMap()
+     */
+    static TQT_DBusData fromUnixFdKeyMap(const TQT_DBusDataMap<TQT_DBusUnixFd>& map);
+
+    /**
+     * @brief Tries to get the encapsulated map
+     *
+     * If the data object is not of type #Map or if its value type is not
+     * #UnixFd this will fail, i.e. the parameter @p ok will be set to
+     * @c false if present.
+     *
+     * @param ok optional pointer to a bool variable to store the
+     *        success information in, i.e. will be set to @c true on success
+     *        and to @c false if the conversion failed (not of type #Map or
+     *        value type not #UnixFd)
+     *
+     * @return the encapsulated map or an empty and #Invalid map if it fails
+     *
+     * @see fromUnixFdKeyMap()
+     */
+    TQT_DBusDataMap<TQT_DBusUnixFd> toUnixFdKeyMap(bool* ok = 0) const;
+
     /**
      * @brief Creates the data objects D-Bus signature
      *
diff --git a/tqdbusdatalist.cpp b/tqdbusdatalist.cpp
index ccf9a39..23f60a5 100644
--- a/tqdbusdatalist.cpp
+++ b/tqdbusdatalist.cpp
@@ -23,6 +23,7 @@
 
 #include "tqdbusdatalist.h"
 #include "tqdbusobjectpath.h"
+#include "tqdbusunixfd.h"
 #include "tqdbusvariant.h"
 
 #include <tqstringlist.h>
@@ -281,6 +282,21 @@ TQT_DBusDataList::TQT_DBusDataList(const TQValueList<TQT_DBusObjectPath>& other)
     }
 }
 
+TQT_DBusDataList::TQT_DBusDataList(const TQValueList<TQT_DBusUnixFd>& other)
+    : d(new Private())
+{
+    d->type = TQT_DBusData::UnixFd;
+
+    if (other.isEmpty()) return;
+
+    TQValueList<TQT_DBusUnixFd>::const_iterator it    = other.begin();
+    TQValueList<TQT_DBusUnixFd>::const_iterator endIt = other.end();
+    for (; it != endIt; ++it)
+    {
+        d->list << TQT_DBusData::fromUnixFd(*it);
+    }
+}
+
 TQT_DBusDataList::~TQT_DBusDataList()
 {
     delete d;
@@ -725,6 +741,28 @@ TQValueList<TQT_DBusObjectPath> TQT_DBusDataList::toObjectPathList(bool* ok) con
     return result;
 }
 
+TQValueList<TQT_DBusUnixFd> TQT_DBusDataList::toUnixFdList(bool* ok) const
+{
+    if (d->type != TQT_DBusData::UnixFd)
+    {
+        if (ok != 0) *ok = false;
+        return TQValueList<TQT_DBusUnixFd>();
+    }
+
+    TQValueList<TQT_DBusUnixFd> result;
+
+    TQValueList<TQT_DBusData>::const_iterator it    = d->list.begin();
+    TQValueList<TQT_DBusData>::const_iterator endIt = d->list.end();
+    for (; it != endIt; ++it)
+    {
+        result << (*it).toUnixFd();
+    }
+
+    if (ok != 0) *ok = true;
+
+    return result;
+}
+
 TQValueList<TQT_DBusVariant> TQT_DBusDataList::toVariantList(bool* ok) const
 {
     if (d->type != TQT_DBusData::Variant)
diff --git a/tqdbusdatalist.h b/tqdbusdatalist.h
index 7b0432c..b04df0b 100644
--- a/tqdbusdatalist.h
+++ b/tqdbusdatalist.h
@@ -29,6 +29,7 @@
 template <typename T> class TQValueList;
 class TQT_DBusObjectPath;
 class TQT_DBusVariant;
+class TQT_DBuxUnixFd;
 class TQString;
 class TQStringList;
 
@@ -298,6 +299,20 @@ public:
      */
     TQT_DBusDataList(const TQValueList<TQT_DBusObjectPath>& other);
 
+    /**
+     * @brief Creates a list from the given TQValueList of unix file handle values
+     *
+     * Type information for the list object will be set to TQT_DBusData::UnixFd
+     * also when the @p other list is empty, i.e. this allows to create an
+     * empty but valid list object, comparable to using
+     * TQT_DBusDataList(TQT_DBusData::Type) with TQT_DBusData::UnixFd
+     *
+     * @param other the TQValueList of unix file handle values to copy from
+     *
+     * @see toUnixFdList()
+     */
+    TQT_DBusDataList(const TQValueList<TQT_DBusUnixFd>& other);
+
     /**
      * @brief Destroys the list object
      */
@@ -717,6 +732,24 @@ public:
      */
     TQValueList<TQT_DBusVariant> toVariantList(bool* ok = 0) const;
 
+    /**
+     * @brief Tries to get the list object's elements as a TQValueList of TQT_DBusUnixFd
+     *
+     * This is a convenience overload for the case when the list is of
+     * type TQT_DBusData::UnixFd.
+     *
+     * @param ok optional pointer to a bool variable to store the
+     *        success information in, i.e. will be set to @c true on success
+     *        and to @c false if the conversion failed (not of type
+     *        TQT_DBusData::UnixFd)
+     *
+     * @return a TQValueList of TQT_DBusUnixFd containing the list object's
+     *         TQT_DBuxUnixFd elements or an empty list when converting fails
+     *
+     * @see TQT_DBusData::toUnixFd()
+     */
+    TQValueList<TQT_DBusUnixFd> toUnixFdList(bool* ok = 0) const;
+
 private:
     class Private;
     Private* d;
diff --git a/tqdbusdatamap.h b/tqdbusdatamap.h
index 24908c8..ecb06d2 100644
--- a/tqdbusdatamap.h
+++ b/tqdbusdatamap.h
@@ -29,6 +29,7 @@
 
 class TQT_DBusData;
 class TQT_DBusObjectPath;
+class TQT_DBusUnixFd;
 class TQT_DBusVariant;
 
 /**
@@ -438,6 +439,29 @@ public:
         }
     }
 
+    /**
+     * @brief Creates a map from the given TQMap of TQT_DBusUnixFd values
+     *
+     * Type information for the map object will be set to TQT_DBusData::UnixFd
+     * also when the @p other map is empty, i.e. this allows to create an
+     * empty but valid map object, comparable to using
+     * TQT_DBusDataMap<T>(TQT_DBusData::Type) with TQT_DBusData::UnixFd
+     *
+     * @param other the TQMap of TQT_DBusUnixFd values to copy from
+     *
+     * @see toUnixFdMap()
+     */
+    TQT_DBusDataMap<T>(const TQMap<T, TQT_DBusUnixFd>& other)
+        : TQMap<T, TQT_DBusData>(), m_valueType(TQT_DBusData::UnixFd)
+    {
+        typename TQMap<T, TQT_DBusUnixFd>::const_iterator it    = other.begin();
+        typename TQMap<T, TQT_DBusUnixFd>::const_iterator endIt = other.end();
+        for (; it != endIt; ++it)
+        {
+            insert(it.key(), TQT_DBusData::fromUnixFd(it.data()));
+        }
+    }
+
     /**
      * @brief Creates a map from the given TQMap of TQT_DBusVariant values
      *
@@ -1174,6 +1198,41 @@ public:
         return result;
     }
 
+    /**
+     * @brief Tries to get the map object's pairs as a TQMap of TQT_DBusUnixFd
+     *
+     * @param ok optional pointer to a bool variable to store the
+     *        success information in, i.e. will be set to @c true on success
+     *        and to @c false if the conversion failed (not of value type
+     *        TQT_DBusData::UnixFd)
+     *
+     * @return a TQMap of TQT_DBusUnixFd containing the map object's TQT_DBusUnixFd
+     *         values or an empty map when converting fails
+     *
+     * @see TQT_DBusData::toUnixFd()
+     */
+    TQMap<T, TQT_DBusObjectPath> toUnixFdMap(bool* ok = 0) const
+    {
+        if (m_valueType != TQT_DBusData::UnixFd)
+        {
+            if (ok != 0) *ok = false;
+            return TQMap<T, TQT_DBusUnixFd>();
+        }
+
+        TQMap<T, TQT_DBusUnixFd> result;
+
+        const_iterator it    = begin();
+        const_iterator endIt = end();
+        for (; it != endIt; ++it)
+        {
+            result.insert(it.key(), (*it).toUnixFd());
+        }
+
+        if (ok != 0) *ok = true;
+
+        return result;
+    }
+
     /**
      * @brief Tries to get the map object's pairs as a TQMap of TQT_DBusVariant
      *
diff --git a/tqdbusmarshall.cpp b/tqdbusmarshall.cpp
index 330e5ac..f4aa5f7 100644
--- a/tqdbusmarshall.cpp
+++ b/tqdbusmarshall.cpp
@@ -27,6 +27,7 @@
 #include "tqdbusdatalist.h"
 #include "tqdbusdatamap.h"
 #include "tqdbusobjectpath.h"
+#include "tqdbusunixfd.h"
 #include "tqdbusvariant.h"
 
 #include <tqvariant.h>
@@ -62,6 +63,7 @@ static TQT_DBusData::Type qSingleTypeForDBusSignature(char signature)
         case 'o': return TQT_DBusData::ObjectPath;
         case 'g': return TQT_DBusData::String;
         case 'v': return TQT_DBusData::Variant;
+        case 'h': return TQT_DBusData::UnixFd;
 
         default:
             break;
@@ -133,6 +135,10 @@ static TQValueList<TQT_DBusData> parseSignature(TQCString& signature)
                             result << TQT_DBusData::fromObjectPathKeyMap(
                                 TQT_DBusDataMap<TQT_DBusObjectPath>(valueType));
                             break;
+                        case TQT_DBusData::UnixFd:
+                            result << TQT_DBusData::fromUnixFdKeyMap(
+                                TQT_DBusDataMap<TQT_DBusUnixFd>(valueType));
+                            break;
                         default:
                             tqWarning("TQT_DBusMarshall: unsupported map key type %s "
                                      "at de-marshalling",
@@ -186,6 +192,10 @@ static TQValueList<TQT_DBusData> parseSignature(TQCString& signature)
                             result << TQT_DBusData::fromObjectPathKeyMap(
                                 TQT_DBusDataMap<TQT_DBusObjectPath>(valueContainer[0]));
                             break;
+                        case TQT_DBusData::UnixFd:
+                            result << TQT_DBusData::fromUnixFdKeyMap(
+                                TQT_DBusDataMap<TQT_DBusUnixFd>(valueContainer[0]));
+                            break;
                         default:
                             tqWarning("TQT_DBusMarshall: unsupported map key type %s "
                                      "at de-marshalling",
@@ -273,6 +283,10 @@ static TQValueList<TQT_DBusData> parseSignature(TQCString& signature)
                             result << TQT_DBusData::fromObjectPath(
                                 (TQT_DBusObjectPath()));
                             break;
+                        case TQT_DBusData::UnixFd:
+                            result << TQT_DBusData::fromUnixFd(
+                                (TQT_DBusUnixFd()));
+                            break;
                         default:
                             result << TQT_DBusData();
                             tqWarning("TQT_DBusMarshall: unsupported element type %s "
@@ -585,6 +599,8 @@ static TQT_DBusData qFetchParameter(DBusMessageIter *it)
 
         return TQT_DBusData::fromStruct(memberList);
     }
+    case DBUS_TYPE_UNIX_FD:
+        return TQT_DBusData::fromUnixFd(TQT_DBusUnixFd(qIterGet<dbus_uint32_t>(it)));
 #if 0
     case DBUS_TYPE_INVALID:
         // TODO: check if there is better way to detect empty arrays
@@ -627,6 +643,12 @@ static void tqAppendToMessage(DBusMessageIter *it, const TQT_DBusObjectPath &pat
     dbus_message_iter_append_basic(it, DBUS_TYPE_OBJECT_PATH, &cdata);
 }
 
+static void tqAppendToMessage(DBusMessageIter *it, const TQT_DBusUnixFd &unixFd)
+{
+    const dbus_int32_t cdata = unixFd.fileDescriptor();
+    dbus_message_iter_append_basic(it, DBUS_TYPE_UNIX_FD, &cdata);
+}
+
 static const char* qDBusTypeForTQT_DBusType(TQT_DBusData::Type type)
 {
     switch (type)
@@ -678,6 +700,9 @@ static const char* qDBusTypeForTQT_DBusType(TQT_DBusData::Type type)
 
         case TQT_DBusData::Map:
             return DBUS_TYPE_DICT_ENTRY_AS_STRING;
+
+        case TQT_DBusData::UnixFd:
+            return DBUS_TYPE_UNIX_FD_AS_STRING;
     }
     return 0;
 }
@@ -991,6 +1016,40 @@ static void qDBusObjectPathKeyMapToIterator(DBusMessageIter* it,
     dbus_message_iter_close_container(it, &sub);
 }
 
+static void qDBusUnixFdKeyMapToIterator(DBusMessageIter* it, const TQT_DBusData& var)
+{
+    DBusMessageIter sub;
+    TQCString sig;
+
+    TQT_DBusDataMap<TQT_DBusUnixFd> map = var.toUnixFdKeyMap();
+
+    sig += DBUS_DICT_ENTRY_BEGIN_CHAR;
+    sig += qDBusTypeForTQT_DBusType(map.keyType());
+
+    if (map.hasContainerValueType())
+        sig += map.containerValueType().buildDBusSignature();
+    else
+        sig += qDBusTypeForTQT_DBusType(map.valueType());
+    sig += DBUS_DICT_ENTRY_END_CHAR;
+
+    dbus_message_iter_open_container(it, DBUS_TYPE_ARRAY, sig.data(), &sub);
+
+    TQT_DBusDataMap<TQT_DBusUnixFd>::const_iterator mit = map.begin();
+    for (; mit != map.end(); ++mit)
+    {
+        DBusMessageIter itemIterator;
+        dbus_message_iter_open_container(&sub, DBUS_TYPE_DICT_ENTRY,
+                                         0, &itemIterator);
+
+        dbus_message_iter_append_basic(it, DBUS_TYPE_UNIX_FD, &(mit.key()));
+        qDBusDataToIterator(&itemIterator, mit.data());
+
+        dbus_message_iter_close_container(&sub, &itemIterator);
+    }
+
+    dbus_message_iter_close_container(it, &sub);
+}
+
 static void qDBusDataToIterator(DBusMessageIter* it, const TQT_DBusData& var)
 {
     switch (var.type())
@@ -1048,6 +1107,10 @@ static void qDBusDataToIterator(DBusMessageIter* it, const TQT_DBusData& var)
         case TQT_DBusData::ObjectPath:
             tqAppendToMessage(it, var.toObjectPath());
             break;
+        case TQT_DBusData::UnixFd: {
+            tqAppendToMessage(it, var.toUnixFd());
+            break;
+        }
         case TQT_DBusData::List: {
             TQT_DBusDataList list = var.toList();
 
@@ -1100,6 +1163,9 @@ static void qDBusDataToIterator(DBusMessageIter* it, const TQT_DBusData& var)
                 case TQT_DBusData::ObjectPath:
                     qDBusObjectPathKeyMapToIterator(it, var);
                     break;
+                case TQT_DBusData::UnixFd:
+                    qDBusUnixFdKeyMapToIterator(it, var);
+                    break;
                 default:
                     tqWarning("TQT_DBusMarshall: unhandled map key type %s "
                              "at marshalling",
diff --git a/tqdbusunixfd.cpp b/tqdbusunixfd.cpp
new file mode 100644
index 0000000..ba7a06c
--- /dev/null
+++ b/tqdbusunixfd.cpp
@@ -0,0 +1,95 @@
+/* tqdbusunixfd.cpp DBUS unix file handle data type
+ *
+ * Copyright (C) 2013 Slávek Banko <slavek.banko@axis.cz>
+ *
+ * Licensed under the Academic Free License version 2.1
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+ * USA.
+ *
+ */
+
+#include <unistd.h> 
+#include "tqdbusunixfd.h"
+
+TQT_DBusUnixFd::TQT_DBusUnixFd() : d(new TQT_DBusUnixFdPrivate())
+{
+    d->ref();
+    d->fd = -1;
+};
+
+TQT_DBusUnixFd::TQT_DBusUnixFd(const TQT_DBusUnixFd& other) : d(other.d)
+{
+    d->ref();
+}
+
+TQT_DBusUnixFd::TQT_DBusUnixFd(int other)
+{
+    setFileDescriptor(other);
+}
+
+TQT_DBusUnixFd::~TQT_DBusUnixFd()
+{
+    if (d && d->deref() ) {
+        if ( isValid() ) {
+            close(d->fd);
+        }
+        delete d;
+    }
+}
+
+bool TQT_DBusUnixFd::isValid() const
+{
+    return d ? d->fd != -1 : false;
+}
+
+int TQT_DBusUnixFd::fileDescriptor() const
+{
+    return d ? d->fd : -1;
+}
+
+void TQT_DBusUnixFd::setFileDescriptor(int fileDescriptor)
+{
+    giveFileDescriptor(fileDescriptor != -1 ? dup(fileDescriptor) : -1);
+}
+
+void TQT_DBusUnixFd::giveFileDescriptor(int fileDescriptor) 
+{
+    if ( d && d->deref() ) {
+        if ( isValid() ) {
+            close(d->fd);
+        }
+    }
+    else {
+        d = new TQT_DBusUnixFdPrivate;
+    }
+    d->ref();
+    d->fd = fileDescriptor;
+}
+
+TQT_DBusUnixFd &TQT_DBusUnixFd::operator=( const TQT_DBusUnixFd &other )
+{
+    if (other.d) {
+        other.d->ref();
+    }
+    if ( d && d->deref() ) {
+        if ( isValid() ) {
+            close(d->fd);
+        }
+        delete d;
+    }
+    d = other.d;
+    return *this;
+}
diff --git a/tqdbusunixfd.h b/tqdbusunixfd.h
new file mode 100644
index 0000000..f38efc8
--- /dev/null
+++ b/tqdbusunixfd.h
@@ -0,0 +1,149 @@
+/* tqdbusunixfd.h DBUS unix file handle data type
+ *
+ * Copyright (C) 2013 Slávek Banko <slavek.banko@axis.cz>
+ *
+ * Licensed under the Academic Free License version 2.1
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+ * USA.
+ *
+ */
+
+#ifndef TQDBUSUNIXFD_H
+#define TQDBUSUNIXFD_H
+
+#include "dbus/dbus.h"
+#ifndef QT_H
+#include "ntqshared.h"
+#endif // QT_H
+
+
+#ifndef DBUS_TYPE_UNIX_FD
+#define   DBUS_TYPE_UNIX_FD   ((int) 'h')
+#endif
+
+#ifndef DBUS_TYPE_UNIX_FD_AS_STRING
+#define   DBUS_TYPE_UNIX_FD_AS_STRING   "h"
+#endif
+
+/**
+ * @brief Class for representing D-Bus unix file handles
+ *
+ * This data type is necessary to correctly represent unix file handles in the
+ * context of D-Bus messages, since normal strings have a different D-Bus
+ * signature than unix file handles.
+ *
+ * @see @ref dbusconventions-unixfd
+ */
+class TQT_DBusUnixFd
+{
+public:
+    /**
+     * @brief Creates an empty and invalid unix file handle
+     */
+    TQT_DBusUnixFd();
+
+    /**
+     * @brief Creates copy of the given @p other unix file handle
+     *
+     * @param other the unix file handle to copy
+     */
+    TQT_DBusUnixFd(const TQT_DBusUnixFd& other);
+
+    /**
+     * @brief Creates copy of the given @p other unix file handle
+     *
+     * @param other the unix file handle to copy
+     */
+    TQT_DBusUnixFd(int other);
+
+    /**
+     * @brief Destroys the unix file handle
+     */
+    virtual ~TQT_DBusUnixFd();
+
+    /**
+     * @brief Returns whether the current content is considered a valid unix file handle
+     *
+     * @return \c true if the object's content describe a valid unix file handle,
+     *         otherwise @c false
+     *
+     * @see @ref dbusconventions-unixfd
+     */
+    bool isValid() const;
+
+    /**
+     * @brief Get unix file handle
+     *
+     * @see @ref dbusconventions-unixfd
+     */
+    int fileDescriptor() const;
+
+    /**
+     * @brief Set new unix file handle
+     *
+     * @see @ref dbusconventions-unixfd
+     */
+    void setFileDescriptor(int fileDescriptor);
+
+    /**
+     * @brief Give unix file handle
+     *
+     * @see @ref dbusconventions-unixfd
+     */
+    void giveFileDescriptor(int fileDescriptor);
+
+    /**
+     * @brief Copy unix file handle from TQT_DBusUnixFd
+     *
+     * @see @ref dbusconventions-unixfd
+     */
+    TQT_DBusUnixFd &operator=( const TQT_DBusUnixFd &other );
+
+    /**
+     * @brief Checks if the given @p other variant is equal to this one
+     *
+     * @param other unix file handle to compare with
+     *
+     * @return @c true if both use same file handle, otherwise
+     *         @c false
+     */
+    inline bool operator==(const TQT_DBusUnixFd& other) const
+    {
+        return (&other == this) || (other.d == d);
+    }
+
+    /**
+     * @brief Checks if the given @p other variant is not equal to this one
+     *
+     * @param other unix file handle to compare with
+     *
+     * @return @c true if both use different file handle, otherwise
+     *         @c false
+     */
+    inline bool operator!=(const TQT_DBusUnixFd& other) const
+    {
+        return (&other != this) && (other.d != d);
+    }
+ 
+
+protected:
+    struct TQT_DBusUnixFdPrivate : public TQShared {
+        int fd;
+    } *d;
+
+};
+
+#endif