--- Makefile.in.orig	2004-06-26 18:01:34.000000000 +0200
+++ Makefile.in.orig	2004-06-26 18:02:48.592222784 +0200
@@ -83,7 +83,7 @@ 
 
 # For linking (configure script will modify this line)
 # xmkmf et imake informations are take into account.
-LIBS = @LIBS@ -lm
+LIBS = @LIBS@ -lm -L/usr/X11R6/lib -lX11
 
 all:demo