diff --git a/extra/x11/xlib/xlib.factor b/extra/x11/xlib/xlib.factor
index 00815104da..6fc586106c 100755
--- a/extra/x11/xlib/xlib.factor
+++ b/extra/x11/xlib/xlib.factor
@@ -1354,8 +1354,6 @@ FUNCTION: Bool XSupportsLocale ( ) ;
 
 FUNCTION: char* XSetLocaleModifiers ( char* modifier_list ) ;
 
-FUNCTION: int XBell ( Display* dpy, int percent ) ;
-
 SYMBOL: dpy
 SYMBOL: scr
 SYMBOL: root