diff --git a/qtinterface/tqt.h.cmake b/qtinterface/tqt.h.cmake
index d558b32..60718e2 100644
--- a/qtinterface/tqt.h.cmake
+++ b/qtinterface/tqt.h.cmake
@@ -748,6 +748,7 @@ Boston, MA 02110-1301, USA.
 #define tqchildren	children
 #define tqfindWidget	findWidget
 #define tqsetObjectName	setObjectName
+#define tqsetWhatsThis	setWhatsThis
 #define tqtopLevelWidget	topLevelWidget
 #define tqparent	parent
 #define tqmask	mask