diff --git a/include/wx/msw/tooltip.h b/include/wx/msw/tooltip.h
index 24b2ee9b26..25ffd75738 100644
--- a/include/wx/msw/tooltip.h
+++ b/include/wx/msw/tooltip.h
@@ -13,6 +13,7 @@
 #define _WX_MSW_TOOLTIP_H_
 
 #include "wx/object.h"
+#include "wx/gdicmn.h"
 
 class WXDLLIMPEXP_FWD_CORE wxWindow;