diff --git a/boards/rss.py b/boards/rss.py
--- a/boards/rss.py
+++ b/boards/rss.py
@@ -33,7 +33,7 @@ class TagThreadsFeed(Feed):
     description_template = 'boards/rss/post.html'
 
     def items(self, obj):
-        return obj.threads.filter(archived=False).order_by('-id')
+        return obj.get_threads().filter(archived=False).order_by('-id')
 
     def get_object(self, request, tag_name):
         return get_object_or_404(Tag, name=tag_name)