diff --git a/ChangeLog b/ChangeLog
index 16e43fbb6..44e8ce592 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2009-05-03  Badlop  <badlop@process-one.net>
+
+	* src/mod_muc/mod_muc_room.erl: Fix badarg return (EJAB-899)
+
 2009-04-30  Christophe Romain <christophe.romain@process-one.net>
 
 	* src/mod_pubsub/mod_pubsub.erl: API change for major optimization
diff --git a/src/mod_muc/mod_muc_room.erl b/src/mod_muc/mod_muc_room.erl
index 634552938..6acd5dfb7 100644
--- a/src/mod_muc/mod_muc_room.erl
+++ b/src/mod_muc/mod_muc_room.erl
@@ -2703,7 +2703,7 @@ is_allowed_persistent_change(XEl, StateData, From) ->
 	    true;
 	true ->
 		{_AccessRoute, _AccessCreate, _AccessAdmin, AccessPersistent} = StateData#state.access,
-		acl:match_rule(StateData#state.server_host, AccessPersistent, From)
+		(allow == acl:match_rule(StateData#state.server_host, AccessPersistent, From))
     end.
 
 %% Check if the Room Name and Room Description defined in the Data Form