diff --git a/lib/rpc-client/mailboxes/tcp-mailbox.js b/lib/rpc-client/mailboxes/tcp-mailbox.js
index 5a0886f..e0e4f9a 100644
--- a/lib/rpc-client/mailboxes/tcp-mailbox.js
+++ b/lib/rpc-client/mailboxes/tcp-mailbox.js
@@ -6,6 +6,7 @@ var net = require('net');
 var Tracer = require('../../util/tracer');
 var DEFAULT_CALLBACK_TIMEOUT = 10 * 1000;
 var DEFAULT_INTERVAL = 50;
+var logger = require('pomelo-logger').getLogger('pomelo-rpc', __filename);
 
 var MailBox = function(server, opts) {
   EventEmitter.call(this);