--- xchain.c.orig	Thu Feb 26 00:10:15 1998
+++ xchain.c	Sat Jun 10 11:29:42 2000
@@ -29,7 +29,9 @@
 #include <stdlib.h>
 #include <time.h>
 
+#ifndef DEF_WISH_PATH
 #define DEF_WISH_PATH "/usr/bin/wish"
+#endif
 
 void wprintf(char *, ...);
 void draw_screen(void);