diff --git a/libtdeedu/extdate/extdatetimeedit.h b/libtdeedu/extdate/extdatetimeedit.h
index ff3c7625..0882669d 100644
--- a/libtdeedu/extdate/extdatetimeedit.h
+++ b/libtdeedu/extdate/extdatetimeedit.h
@@ -355,7 +355,7 @@ protected:
 #ifndef TQT_NO_WHEELEVENT
     void wheelEvent( TQWheelEvent *e )
     {
-	ExtDateTimeEditor *editor = (ExtDateTimeEditor*)editWidget()->qt_cast( "ExtDateTimeEditor" );
+	ExtDateTimeEditor *editor = (ExtDateTimeEditor*)editWidget()->tqt_cast( "ExtDateTimeEditor" );
 	Q_ASSERT( editor );
 	if ( !editor )
 	    return;