diff --git a/libemailfunctions/idmapper.cpp b/libemailfunctions/idmapper.cpp
index 62bcc7ef..296b3af6 100644
--- a/libemailfunctions/idmapper.cpp
+++ b/libemailfunctions/idmapper.cpp
@@ -176,8 +176,8 @@ const TQString& IdMapper::fingerprint( const TQString &localId ) const
 {
   if ( mFingerprintMap.contains( localId ) )
     return mFingerprintMap[ localId ];
-  else 
-    return TQString();
+  else
+    return TQString::null;
 }
 
 TQMap<TQString, TQString> IdMapper::remoteIdMap() const