diff --git a/src/msw/toplevel.cpp b/src/msw/toplevel.cpp
index 54e3d09bf1..a47eed6e91 100644
--- a/src/msw/toplevel.cpp
+++ b/src/msw/toplevel.cpp
@@ -38,6 +38,7 @@
 #endif //WX_PRECOMP
 
 #include "wx/dynlib.h"
+#include "wx/tooltip.h"
 
 #include "wx/msw/private.h"
 #if defined(__WXWINCE__) && !defined(__HANDHELDPC__)