diff --git a/apps/emqx_gateway/src/mqttsn/emqx_sn_channel.erl b/apps/emqx_gateway/src/mqttsn/emqx_sn_channel.erl
index 846f40b33..05dff665a 100644
--- a/apps/emqx_gateway/src/mqttsn/emqx_sn_channel.erl
+++ b/apps/emqx_gateway/src/mqttsn/emqx_sn_channel.erl
@@ -475,7 +475,7 @@ handle_in(?SN_WILLMSG_MSG(Payload),
     end;
 
 %% TODO: takeover ???
-handle_in(Packet = ?SN_CONNECT_MSG(_Flags, _ProtoId, _Duration, ClientId),
+handle_in(?SN_CONNECT_MSG(_Flags, _ProtoId, _Duration, ClientId),
           Channel = #channel{
                        clientinfo = #{clientid := ClientId},
                        conn_state = ConnState})