diff --git a/src/msw/glcanvas.cpp b/src/msw/glcanvas.cpp
index 4f84b3c388..3735184352 100644
--- a/src/msw/glcanvas.cpp
+++ b/src/msw/glcanvas.cpp
@@ -26,6 +26,7 @@
     #include "wx/settings.h"
     #include "wx/intl.h"
     #include "wx/log.h"
+    #include "wx/app.h"
 #endif
 
 #include "wx/msw/private.h"