diff --git a/lib/response.js b/lib/response.js
index 65aa8ec63..ae2f7bdb5 100644
--- a/lib/response.js
+++ b/lib/response.js
@@ -19,6 +19,7 @@ const only = require('only');
 const util = require('util');
 const encodeUrl = require('encodeurl');
 const Stream = require('stream');
+const URL = require('url').URL;
 
 /**
  * Prototype.