diff --git a/src/mod_muc/mod_muc.erl b/src/mod_muc/mod_muc.erl
index 89f815670..c2af1ff83 100644
--- a/src/mod_muc/mod_muc.erl
+++ b/src/mod_muc/mod_muc.erl
@@ -306,7 +306,7 @@ handle_info({room_destroyed, RoomHost, Pid}, State) ->
 		mnesia:delete_object(#muc_online_room{name_host = RoomHost,
 						      pid = Pid})
 	end,
-    mnesia:async_dirty(F),
+    mnesia:sync_dirty(F),
     {noreply, State};
 handle_info(_Info, State) ->
     {noreply, State}.
@@ -603,7 +603,7 @@ register_room(Host, Room, Pid) ->
     		mnesia:write(#muc_online_room{name_host = {Room, Host},
     					      pid = Pid})
     	end,
-    mnesia:async_dirty(F).
+    mnesia:sync_dirty(F).
 
 iq_disco_info(Lang) ->
     [{xmlelement, "identity",