diff --git a/lib/_http_client.js b/lib/_http_client.js
index daa37ef064e..200a08e5d5b 100644
--- a/lib/_http_client.js
+++ b/lib/_http_client.js
@@ -21,6 +21,8 @@ function ClientRequest(options, cb) {
 
   if (typeof options === 'string') {
     options = url.parse(options);
+  } else {
+    options = util._extend({}, options);
   }
 
   var agent = options.agent;