diff --git a/include/wx/mdi.h b/include/wx/mdi.h
index e11290ead9..2a7bbc2cfa 100644
--- a/include/wx/mdi.h
+++ b/include/wx/mdi.h
@@ -17,6 +17,7 @@
 #if wxUSE_MDI
 
 #include "wx/frame.h"
+#include "wx/menu.h"
 
 // forward declarations
 class WXDLLIMPEXP_FWD_CORE wxMDIParentFrame;