diff --git a/django/contrib/syndication/views.py b/django/contrib/syndication/views.py
index 3236f9dfab..3bab3bcac9 100644
--- a/django/contrib/syndication/views.py
+++ b/django/contrib/syndication/views.py
@@ -21,6 +21,6 @@ def feed(request, url, feed_dict=None):
     except feeds.FeedDoesNotExist:
         raise Http404, "Invalid feed parameters. Slug %r is valid, but other parameters, or lack thereof, are not." % slug
 
-    response = HttpResponse(mimetype='application/xml')
+    response = HttpResponse(mimetype=feedgen.mime_type)
     feedgen.write(response, 'utf-8')
     return response
diff --git a/django/utils/feedgenerator.py b/django/utils/feedgenerator.py
index d482685383..696b55d493 100644
--- a/django/utils/feedgenerator.py
+++ b/django/utils/feedgenerator.py
@@ -111,6 +111,7 @@ class Enclosure:
         self.url, self.length, self.mime_type = url, length, mime_type
 
 class RssFeed(SyndicationFeed):
+    mime_type = 'application/rss+xml'
     def write(self, outfile, encoding):
         handler = SimplerXMLGenerator(outfile, encoding)
         handler.startDocument()
@@ -176,6 +177,7 @@ class Rss201rev2Feed(RssFeed):
 
 class Atom1Feed(SyndicationFeed):
     # Spec: http://atompub.org/2005/07/11/draft-ietf-atompub-format-10.html
+    mime_type = 'application/atom+xml'
     ns = u"http://www.w3.org/2005/Atom"
     def write(self, outfile, encoding):
         handler = SimplerXMLGenerator(outfile, encoding)