diff --git a/lisp/fileloop.el b/lisp/fileloop.el
index 833bb0401cb..668b9d4cd16 100644
--- a/lisp/fileloop.el
+++ b/lisp/fileloop.el
@@ -55,6 +55,9 @@
 (defvar fileloop--iterator iter-empty)
 (defvar fileloop--scan-function
   (lambda () (user-error "No operation in progress")))
+;; If the default value below is changed, the :enable form of
+;; tags-continue and tags-repl-continue in menu-bar.el will have to be
+;; updated accordingly.
 (defvar fileloop--operate-function #'ignore)
 (defvar fileloop--freshly-initialized nil)