1 files changed, 1 insertions, 1 deletions

diff --git a/lisp/dired-aux.el b/lisp/dired-aux.el
index 69ea15922c4..c8e37ea340a 100644
--- a/lisp/dired-aux.el
+++ b/lisp/dired-aux.el
@@ -98,7 +98,7 @@ With prefix arg, prompt for argument SWITCHES which is options for `diff'."
     (setq failures
           (dired-bunch-files 10000
                              (function dired-check-process)
-                             (list operation program new-attribute)
+                             (list operation program new-attribute "--")
                              files))
     (dired-do-redisplay arg);; moves point if ARG is an integer
     (if failures