--- ./xli.h.org	Thu Jul 28 18:13:28 1994
+++ ./xli.h	Wed Nov 23 21:03:24 1994
@@ -288,6 +288,7 @@
 
 void          flipBits();	/* value.c */
 
+#define zopen zzopen /* to avoid conflict with zopen in stdio.h */
 ZFILE   *zopen(); /* zio.c */
 int      zread();
 void     zunread();