diff --git a/lisp/help.el b/lisp/help.el
index ff8d18066f7..850cf3078d9 100644
--- a/lisp/help.el
+++ b/lisp/help.el
@@ -168,6 +168,7 @@ Commands:
 (add-hook 'temp-buffer-show-hook 'help-mode-maybe)
 
 (defun help-quit ()
+  "Just exit from the Help command's command loop."
   (interactive)
   nil)