diff --git a/sed/utils.c b/sed/utils.c
index 4028d98..2e74654 100644
--- a/sed/utils.c
+++ b/sed/utils.c
@@ -181,7 +181,7 @@ ck_mkstemp (char **p_filename, const char *tmpdir,
       so unauthorized users cannot nip in before the file is ready.
     
       mkstemp forces O_BINARY on cygwin, so use mkostemp instead.  */
-  save_umask = umask (0700);
+  save_umask = umask (0077);
   fd = mkostemp (template, 0);
   umask (save_umask);
   if (fd == -1)