diff --git a/qtinterface/tqt.h.cmake b/qtinterface/tqt.h.cmake
index 4476a83..514895d 100644
--- a/qtinterface/tqt.h.cmake
+++ b/qtinterface/tqt.h.cmake
@@ -128,6 +128,7 @@ Boston, MA 02110-1301, USA.
 #define tqCount qCount
 #define tqHash qHash
 #define tqAppName qAppName
+#define tqAppClass qAppClass
 
 #endif