diff --git a/lisp/dired.el b/lisp/dired.el
index 4218f1050c4..41b08b4f2ec 100644
--- a/lisp/dired.el
+++ b/lisp/dired.el
@@ -989,7 +989,7 @@ If DIRNAME is already in a dired buffer, that buffer is used without refresh."
       '("Flag..." . dired-flag-files-regexp))
     (define-key map [menu-bar regexp mark]
       '("Mark..." . dired-mark-files-regexp))
-    (define-key map [menu-bar regexp mark]
+    (define-key map [menu-bar regexp mark-cont]
       '("Mark Containing..." . dired-mark-files-containing-regexp))
 
     (define-key map [menu-bar mark]