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,
    /* The ownership might change, so omit some permissions at first
       so unauthorized users cannot nip in before the file is ready.
       mkstemp forces O_BINARY on cygwin, so use mkostemp instead.  */
-  mode_t save_umask = umask (0700);
+  mode_t save_umask = umask (0077);
   int fd = mkostemp (template, 0);
   umask (save_umask);
   if (fd == -1)