diff --git a/src/dbus/qdbusmarshaller.cpp b/src/dbus/qdbusmarshaller.cpp
index d17c04f00..925fae6b9 100644
--- a/src/dbus/qdbusmarshaller.cpp
+++ b/src/dbus/qdbusmarshaller.cpp
@@ -399,21 +399,6 @@ bool QDBusMarshaller::appendVariantInternal(const QVariant &arg)
     }
 
     switch (*signature) {
-#ifdef __OPTIMIZE__
-    case DBUS_TYPE_BYTE:
-    case DBUS_TYPE_INT16:
-    case DBUS_TYPE_UINT16:
-    case DBUS_TYPE_INT32:
-    case DBUS_TYPE_UINT32:
-    case DBUS_TYPE_INT64:
-    case DBUS_TYPE_UINT64:
-    case DBUS_TYPE_DOUBLE:
-        qIterAppend(&iterator, ba, *signature, arg.constData());
-        return true;
-    case DBUS_TYPE_BOOLEAN:
-        append( arg.toBool() );
-        return true;
-#else
     case DBUS_TYPE_BYTE:
         append( qvariant_cast<uchar>(arg) );
         return true;
@@ -441,7 +426,6 @@ bool QDBusMarshaller::appendVariantInternal(const QVariant &arg)
     case DBUS_TYPE_DOUBLE:
         append( arg.toDouble() );
         return true;
-#endif
 
     case DBUS_TYPE_STRING:
         append( arg.toString() );