diff --git a/lisp/dired-aux.el b/lisp/dired-aux.el
index 51749acb217..41fcd062fb8 100644
--- a/lisp/dired-aux.el
+++ b/lisp/dired-aux.el
@@ -2899,6 +2899,7 @@ directories.
 REGEXP should use constructs supported by your local `grep' command."
   (interactive "sSearch marked files (regexp): ")
   (require 'grep)
+  (require 'xref)
   (defvar grep-find-ignored-files)
   (declare-function rgrep-find-ignored-directories "grep" (dir))
   (let* ((files (dired-get-marked-files nil nil nil nil t))