--- ./uip/spost.c.orig	Sat Mar 20 15:45:06 1999
+++ ./uip/spost.c	Sat Mar 20 16:45:37 1999
@@ -339,8 +339,8 @@
 	out = stdout;
     }
     else {
-	    mktemp (tmpfil);
-	    if ((out = fopen (tmpfil, "w")) == NULL)
+	    int fd = mkstemp (tmpfil);
+	    if ((fd == -1) || ((out = fdopen (fd, "w")) == NULL))
 		adios (tmpfil, "unable to create");
 	    chmod (tmpfil, 0600);
 	}
@@ -700,8 +700,8 @@
     char *vec[6];
     FILE * in, *out;
 
-    mktemp (bccfil);
-    if ((out = fopen (bccfil, "w")) == NULL)
+    fd = mkstemp (bccfil);
+    if ((fd == -1) || ((out = fdopen (fd, "w")) == NULL))
 	adios (bccfil, "unable to create");
     chmod (bccfil, 0600);