diff --git a/src/transport/service_channel.erl b/src/transport/service_channel.erl
index a3c0af3..cb18f8e 100644
--- a/src/transport/service_channel.erl
+++ b/src/transport/service_channel.erl
@@ -131,7 +131,7 @@ handle_request(#'ServiceRequest'{packet_id = PacketId, request = {register, #'Se
 
 %% 订阅事件
 handle_request(#'ServiceRequest'{packet_id = PacketId, request = {subscribe, #'ServiceRequest.Subscribe'{topic = Topic}}},
-    State = #state{ subscribed_topics = SubscribedTopics, is_registered = true}) ->
+    State = #state{subscribed_topics = SubscribedTopics, is_registered = true}) ->
 
     case efka_subscription:subscribe(Topic, self()) of
         ok ->