diff --git a/django/contrib/syndication/feeds.py b/django/contrib/syndication/feeds.py
index a553ffb1f4..45b97d970a 100644
--- a/django/contrib/syndication/feeds.py
+++ b/django/contrib/syndication/feeds.py
@@ -82,7 +82,8 @@ class Feed(object):
             link = link,
             description = self.__get_dynamic_attr('description', obj),
             language = settings.LANGUAGE_CODE.decode(),
-            feed_url = add_domain(current_site, self.__get_dynamic_attr('feed_url', obj)),
+            feed_url = add_domain(current_site.domain,
+                                  self.__get_dynamic_attr('feed_url', obj)),
             author_name = self.__get_dynamic_attr('author_name', obj),
             author_link = self.__get_dynamic_attr('author_link', obj),
             author_email = self.__get_dynamic_attr('author_email', obj),