1 files changed, 2 insertions, 1 deletions

diff --git a/lisp/files.el b/lisp/files.el
index ce4d67d33e4..4983b1287e8 100644
--- a/lisp/files.el
+++ b/lisp/files.el
@@ -2552,7 +2552,8 @@ BACKUPNAME is the backup file name, which is the old file renamed."
               (not (file-writable-p to-name)))
          (delete-file to-name))
      (copy-file from-name to-name t t)))
-  (set-file-modes to-name (logand modes #o1777)))
+  (and modes
+       (set-file-modes to-name (logand modes #o1777))))
 
 (defun file-name-sans-versions (name &optional keep-backup-version)
   "Return file NAME sans backup versions or strings.