diff --git a/qad/graphic/graphic.cpp b/qad/graphic/graphic.cpp
index 6f53f1d..0db6d40 100644
--- a/qad/graphic/graphic.cpp
+++ b/qad/graphic/graphic.cpp
@@ -4,6 +4,9 @@
 #if QT_VERSION >= 0x050100
 //#  include <QSensorGestureManager>
 #endif
+#ifndef GL_MULTISAMPLE
+#  define GL_MULTISAMPLE 0x809D
+#endif
 
 
 __GraphicRegistrator__ __graphic_registrator__;