diff --git a/include/wx/msw/window.h b/include/wx/msw/window.h
index f440f5652a..bb3c5a2cd9 100644
--- a/include/wx/msw/window.h
+++ b/include/wx/msw/window.h
@@ -208,7 +208,7 @@ public:
 
     // Make a Windows extended style from the given wxWindows window style
     static WXDWORD MakeExtendedStyle(long style,
-                                     bool eliminateBorders = TRUE);
+                                     bool eliminateBorders = FALSE);
     // Determine whether 3D effects are wanted
     WXDWORD Determine3DEffects(WXDWORD defaultBorderStyle, bool *want3D) const;