diff --git a/lisp/url/url-gw.el b/lisp/url/url-gw.el
index 153d146b608..35104821782 100644
--- a/lisp/url/url-gw.el
+++ b/lisp/url/url-gw.el
@@ -34,7 +34,7 @@
 (autoload 'open-tls-stream "tls")
 
 (defgroup url-gateway nil
-  "URL gateway variables"
+  "URL gateway variables."
   :group 'url)
 
 (defcustom url-gateway-local-host-regexp nil