diff --git a/service/clusteragent.lua b/service/clusteragent.lua
index b0b8c2b8..541b3f5d 100644
--- a/service/clusteragent.lua
+++ b/service/clusteragent.lua
@@ -1,5 +1,4 @@
 local skynet = require "skynet"
-local sc = require "skynet.socketchannel"
 local socket = require "skynet.socket"
 local cluster = require "skynet.cluster.core"
 local ignoreret = skynet.ignoreret