diff --git a/hw/xwin/winmultiwindowwm.c b/hw/xwin/winmultiwindowwm.c
index df7e6d3d5..c68387d81 100644
--- a/hw/xwin/winmultiwindowwm.c
+++ b/hw/xwin/winmultiwindowwm.c
@@ -184,6 +184,7 @@ static Bool g_shutdown = FALSE;
  * Translate msg id to text, for debug purposes
  */
 
+#if CYGMULTIWINDOW_DEBUG
 static const char *
 MessageName(winWMMessagePtr msg)
 {
@@ -233,6 +234,7 @@ MessageName(winWMMessagePtr msg)
       break;
     }
 }
+#endif
 
 
 /*