--- a/plugins/muc/muc.lib.lua	Fri Sep 26 17:33:38 2014 -0400
+++ b/plugins/muc/muc.lib.lua	Fri Sep 26 17:34:02 2014 -0400
@@ -743,7 +743,7 @@
 					reply:tag("item", {affiliation = _aff, jid = jid}):up();
 				end
 			end
-			origin.send(reply);
+			origin.send(reply:up());
 			return true;
 		else
 			origin.send(st.error_reply(stanza, "auth", "forbidden"));