diff --git a/include/wx/nativewin.h b/include/wx/nativewin.h
index 3aa6ffc790..be24584745 100644
--- a/include/wx/nativewin.h
+++ b/include/wx/nativewin.h
@@ -152,6 +152,12 @@ public:
     // handle of this object and all of its children is invalid any more)
     virtual void OnNativeDestroyed();
 
+protected:
+#ifdef __WXMSW__
+    virtual WXLRESULT
+    MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam);
+#endif // __WXMSW__
+
 private:
     DECLARE_NO_COPY_CLASS(wxNativeContainerWindow)
 };