diff --git a/include/wx/msw/wrapcdlg.h b/include/wx/msw/wrapcdlg.h
index 5e87f2790e..af296792f9 100644
--- a/include/wx/msw/wrapcdlg.h
+++ b/include/wx/msw/wrapcdlg.h
@@ -22,5 +22,7 @@
     #include <commdlg.h>
 #endif
 
+#include "wx/msw/winundef.h"
+
 #endif // _WX_MSW_WRAPCDLG_H_