Index: fileio.c
===================================================================
--- fileio.c.orig	2005-06-16 05:31:52.000000000 +0200
+++ fileio.c	2009-11-24 18:19:52.483933000 +0100
@@ -919,7 +919,18 @@ char *zip;              /* path name of
   }
 #else
   strcat(t, "ziXXXXXX"); /* must use lowercase for Linux dos file system */
+#ifdef NO_MKSTEMP
   return mktemp(t);
+#else
+  {
+    int fd;
+
+    if ((fd = mkstemp(t)) < 0)
+      return NULL;
+    close(fd);
+  }
+  return t;
+#endif
 #endif /* NO_MKTEMP */
 #endif /* TANDEM */
 #endif /* CMS_MVS */