--- xlisp.h.orig	Fri Mar 27 06:16:11 1998
+++ xlisp.h	Thu Dec 23 16:44:31 1999
@@ -1642,7 +1642,7 @@
 extern LVAL tentry _((int ch));
 extern int xlload _((char *fname, int vflag, int pflag));
 extern int xlread _((LVAL fptr, LVAL *pval, int rflag, int pwflag));
-extern int isnumber _((char *str, LVAL *pval));
+extern int xl_isnumber _((char *str, LVAL *pval));
 
 /* for xlstruct */
 extern LVAL xlrdstruct _((LVAL list));
