diff --git a/src/wxwindow/src/msw/wx_frame.cxx b/src/wxwindow/src/msw/wx_frame.cxx
index 09b589001d..c205d2a063 100644
--- a/src/wxwindow/src/msw/wx_frame.cxx
+++ b/src/wxwindow/src/msw/wx_frame.cxx
@@ -960,6 +960,7 @@ wxFrameWnd::wxFrameWnd(wxWnd *parent, char *WXUNUSED(wclass), wxWindow *wx_win,
       extendedStyle |= WS_EX_TOPMOST;
     else
       extendedStyle |= WS_EX_PALETTEWINDOW;
+    extendedStyle |= WS_EX_TOOLWINDOW;
   }
 
   icon = NULL;