diff --git a/src/msw/radiobut.cpp b/src/msw/radiobut.cpp
index 317d79957a..f3d6507c8c 100644
--- a/src/msw/radiobut.cpp
+++ b/src/msw/radiobut.cpp
@@ -31,6 +31,7 @@
 #ifndef WX_PRECOMP
     #include "wx/settings.h"
     #include "wx/dcscreen.h"
+    #include "wx/toplevel.h"
 #endif
 
 #include "wx/msw/private.h"