diff --git a/src/tools/dbusxml2qt3/methodgen.cpp b/src/tools/dbusxml2qt3/methodgen.cpp
index 89c3677..882c1cd 100644
--- a/src/tools/dbusxml2qt3/methodgen.cpp
+++ b/src/tools/dbusxml2qt3/methodgen.cpp
@@ -457,7 +457,6 @@ static void writeMethodIntrospection(const Method& method, bool& firstArgument,
         if (firstArgument)
         {
             firstArgument = false;
-
             stream << "    TQDomElement argumentElement = document.createElement("
                    << "\"arg\");" << endl;
         }
@@ -537,6 +536,7 @@ static void writeNodeInitialization(const Class& classData,
     stream << "}" << endl;
     stream << endl;
 }
+
 static void writeNodeIntrospection(const Class& classData,
         const TQValueList<Class>& interfaces, TQTextStream& stream)
 {
@@ -607,10 +607,6 @@ bool MethodGenerator::extractMethods(const TQDomElement& interfaceElement,
             method.noReply = false;
             method.async = hasAnnotation(element, "org.freedesktop.DBus.GLib.Async");
             classData.methods.append(method);
-            if (method.async) {
-                method.async = false;
-                classData.methods.append(method);
-            }
         }
         else if (element.tagName() == "signal")
         {
@@ -1680,6 +1676,7 @@ void MethodGenerator::writeIntrospectionDataMethod(const Class& classData,
 
     bool firstMethod   = true;
     bool firstArgument = true;
+    bool firstAsync    = true;
 
     TQValueList<Method>::const_iterator it    = classData.methods.begin();
     TQValueList<Method>::const_iterator endIt = classData.methods.end();
@@ -1699,6 +1696,23 @@ void MethodGenerator::writeIntrospectionDataMethod(const Class& classData,
                    << "\"method\");" << endl;
         }
 
+        if ((*it).async)
+        {
+            if (firstAsync) {
+                firstAsync=false;
+                stream << "    TQDomElement asyncAnnotationElement = document.createElement("
+                        << "\"annotation\");" << endl;
+            }
+            else
+            {
+                stream << "    asyncAnnotationElement = document.createElement("
+                        << "\"annotation\");" << endl;
+            }
+            stream << "    asyncAnnotationElement.setAttribute(\"name\", "
+                    << "\"org.freedesktop.DBus.GLib.Async\");" << endl;
+            stream << "    methodElement.appendChild(asyncAnnotationElement);" << endl;
+        }
+
         writeMethodIntrospection(*it, firstArgument, stream);
 
         stream << "    interfaceElement.appendChild(methodElement);" << endl;