--- ./uip/rcvtty.c.orig	Sat Mar 20 15:43:23 1999
+++ ./uip/rcvtty.c	Sat Mar 20 15:44:27 1999
@@ -189,8 +189,9 @@
     char tmpfil[BUFSIZ];
     struct stat st;
 
-    unlink (mktemp (strncpy (tmpfil, "/tmp/rcvttyXXXXX", sizeof(tmpfil))));
-    if ((fd = open (tmpfil, O_RDWR | O_CREAT | O_TRUNC, 0600)) == NOTOK)
+    strcpy (tmpfil, "/tmp/rcvttyXXXXX");
+    fd = mkstemp (tmpfil);
+    if (fd == -1)
 	return header_fd ();
     unlink (tmpfil);