diff -uNr --exclude=*.orig work.old/ztelnet/zmodem/rbsb.c work/ztelnet/zmodem/rbsb.c
--- work.old/ztelnet/zmodem/rbsb.c	Mon Apr 24 23:09:14 1995
+++ work/ztelnet/zmodem/rbsb.c	Tue Jun 20 22:58:32 2000
@@ -7,6 +7,9 @@
 
 STATIC char *Copyr = "Copyright 1993 Omen Technology Inc All Rights Reserved";
 
+#undef V7
+#define POSIX
+
 #ifdef V7
 #include <sys/types.h>
 #include <sys/stat.h>