diff --git a/slixmpp/plugins/xep_0045/muc.py b/slixmpp/plugins/xep_0045/muc.py
index 03d01dba..810bc51e 100644
--- a/slixmpp/plugins/xep_0045/muc.py
+++ b/slixmpp/plugins/xep_0045/muc.py
@@ -88,7 +88,7 @@ class XEP_0045(BasePlugin):
         self.xmpp.register_handler(
             Callback(
                 'MUCPresence',
-                MatchXMLMask("<presence xmlns='%s' />" % self.xmpp.default_ns),
+                StanzaPath("presence/muc"),
                 self.handle_groupchat_presence,
         ))
         self.xmpp.register_handler(