diff --git a/qtinterface/tqt.h.cmake b/qtinterface/tqt.h.cmake
index 03d4345..8f97966 100644
--- a/qtinterface/tqt.h.cmake
+++ b/qtinterface/tqt.h.cmake
@@ -220,6 +220,8 @@ Boston, MA 02110-1301, USA.
 #define tqcolor0 color0
 #define tqcolor1 color1
 
+#define IID_TQWidgetFactory IID_QWidgetFactory
+
 #define TQAccel QAccel
 #define TQAccessible QAccessible
 #define TQAccessibleObject QAccessibleObject