diff --git a/hw/xwin/win.h b/hw/xwin/win.h
index 80fc504f6..a738a5940 100644
--- a/hw/xwin/win.h
+++ b/hw/xwin/win.h
@@ -1335,9 +1335,6 @@ void
 void
  winMWExtWMMoveResizeXWindow(WindowPtr pWin, int x, int y, int w, int h);
 
-void
- winMWExtWMUpdateIcon(Window id);
-
 void
 
 winMWExtWMUpdateWindowDecoration(win32RootlessWindowPtr pRLWinPriv,