diff --git a/src/emqttd_bridge.erl b/src/emqttd_bridge.erl
index 74a21fadd..dfb68add3 100644
--- a/src/emqttd_bridge.erl
+++ b/src/emqttd_bridge.erl
@@ -24,6 +24,7 @@
 %%%
 %%% @end
 %%%-----------------------------------------------------------------------------
+
 -module(emqttd_bridge).
 
 -author("Feng Lee <feng@emqtt.io>").
@@ -47,15 +48,15 @@
                 qos                = ?QOS_2,
                 topic_suffix       = <<>>,
                 topic_prefix       = <<>>,
-                mqueue             :: emqttd_mqueue:mqueue(),
-                max_queue_len      = 0,
+                mqueue            :: emqttd_mqueue:mqueue(),
+                max_queue_len      = 10000,
                 ping_down_interval = ?PING_DOWN_INTERVAL,
                 status             = up}).
 
--type option()  :: {max_queue_len, pos_integer()} |
-                   {qos, mqtt_qos()} |
+-type option()  :: {qos, mqtt_qos()} |
                    {topic_suffix, binary()} |
                    {topic_prefix, binary()} |
+                   {max_queue_len, pos_integer()} |
                    {ping_down_interval, pos_integer()}.
 
 -export_type([option/0]).
@@ -85,7 +86,7 @@ init([Node, SubTopic, Options]) ->
             MQueue = emqttd_mqueue:new(qname(Node, SubTopic),
                                        [{max_len, State#state.max_queue_len}],
                                        emqttd_alarm:alarm_fun()),
-            emqttd_pubsub:subscribe({SubTopic, State#state.qos}),
+            emqttd_pubsub:subscribe(SubTopic, State#state.qos),
             {ok, State#state{mqueue = MQueue}};
         false -> 
             {stop, {cannot_connect, Node}}
@@ -102,7 +103,9 @@ parse_opts([{topic_prefix, Prefix} | Opts], State) ->
 parse_opts([{max_queue_len, Len} | Opts], State) ->
     parse_opts(Opts, State#state{max_queue_len = Len});
 parse_opts([{ping_down_interval, Interval} | Opts], State) ->
-    parse_opts(Opts, State#state{ping_down_interval = Interval*1000}).
+    parse_opts(Opts, State#state{ping_down_interval = Interval*1000});
+parse_opts([_Opt | Opts], State) ->
+    parse_opts(Opts, State).
 
 qname(Node, SubTopic) when is_atom(Node) ->
     qname(atom_to_list(Node), SubTopic);