diff --git a/plugins/RSS/plugin.py b/plugins/RSS/plugin.py
index 37a8a694f..a6145a317 100644
--- a/plugins/RSS/plugin.py
+++ b/plugins/RSS/plugin.py
@@ -240,7 +240,7 @@ class RSS(callbacks.Plugin):
                 particular feed.""")))
 
     def register_feed(self, name, url, initial,
-            plugin_is_loading, announced=[]):
+            plugin_is_loading, announced=None):
         self.feed_names[name] = url
         self.feeds[url] = Feed(name, url, initial,
                 plugin_is_loading, announced)