diff --git a/src/msw/tooltip.cpp b/src/msw/tooltip.cpp
index 1ff9a95eb2..394ae2b17f 100644
--- a/src/msw/tooltip.cpp
+++ b/src/msw/tooltip.cpp
@@ -30,6 +30,7 @@
     #include "wx/msw/wrapcctl.h" // include <commctrl.h> "properly"
     #include "wx/app.h"
     #include "wx/control.h"
+    #include "wx/toplevel.h"
 #endif
 
 #include "wx/tokenzr.h"