diff --git a/apm-sniffer/apm-sdk-plugin/netty-socketio-plugin/src/main/resources/skywalking-plugin.def b/apm-sniffer/apm-sdk-plugin/netty-socketio-plugin/src/main/resources/skywalking-plugin.def
index 5416d7468..351e082ff 100644
--- a/apm-sniffer/apm-sdk-plugin/netty-socketio-plugin/src/main/resources/skywalking-plugin.def
+++ b/apm-sniffer/apm-sdk-plugin/netty-socketio-plugin/src/main/resources/skywalking-plugin.def
@@ -16,4 +16,3 @@
 
 netty-socketio=org.apache.skywalking.apm.plugin.netty.socketio.define.NettySocketIOPluginClientInstrumentation
 netty-socketio=org.apache.skywalking.apm.plugin.netty.socketio.define.NettySocketIOPluginNameSpaceInstrumentation
-netty-socketio=org.apache.skywalking.apm.plugin.netty.socketio.define.NettySocketIOPluginConnectionInstrumentation