diff --git a/lib/_debug_agent.js b/lib/_debug_agent.js
index b20a960fdaaece..3457c6db8ac9d6 100644
--- a/lib/_debug_agent.js
+++ b/lib/_debug_agent.js
@@ -96,9 +96,8 @@ function Client(agent, socket) {
 
   this.on('data', this.onCommand);
 
-  var self = this;
-  this.socket.on('close', function() {
-    self.destroy();
+  this.socket.on('close', () => {
+    this.destroy();
   });
 }
 util.inherits(Client, Transform);