diff -r 56cd8111b7f7 -r 41300fa6a67c src/dbus/qdbusxmlgenerator.cpp
--- a/src/dbus/qdbusxmlgenerator.cpp	Tue Jan 26 12:42:25 2010 +0200
+++ b/src/dbus/qdbusxmlgenerator.cpp	Tue Feb 02 00:43:10 2010 +0200
@@ -203,7 +203,7 @@
                 const char *typeName = QVariant::typeToName( QVariant::Type(types.at(j)) );
                 xml += QString::fromLatin1("      <annotation name=\"com.trolltech.QtDBus.QtTypeName.%1%2\" value=\"%3\"/>\n")
                        .arg(isOutput ? QLatin1String("Out") : QLatin1String("In"))
-                       .arg(isOutput ? j - inputCount : j - 1)
+                       .arg(isOutput && !isSignal ? j - inputCount : j - 1)
                        .arg(typeNameToXml(typeName));
             }
         }