diff --git a/lib/socket.js b/lib/socket.js
index 159b56d4d..185377fb8 100644
--- a/lib/socket.js
+++ b/lib/socket.js
@@ -26,6 +26,7 @@ function Socket(options) {
   this.setNoDelay = noop
   this.setKeepAlive = noop
   this.resume = noop
+  this.unref = noop
 
   // totalDelay that has already been applied to the current
   // request/connection, timeout error will be generated if