diff --git a/lib/Github/HttpClient/HttpClient.php b/lib/Github/HttpClient/HttpClient.php
index 2ba4d9cf873..cfc44fbbda0 100644
--- a/lib/Github/HttpClient/HttpClient.php
+++ b/lib/Github/HttpClient/HttpClient.php
@@ -135,7 +135,6 @@ public function put($path, $body, array $headers = array())
     public function request($path, $body = null, $httpMethod = 'GET', array $headers = array(), array $options = array())
     {
         $request = $this->createRequest($httpMethod, $path, $body, $headers, $options);
-        $request->addHeaders($headers);
 
         try {
             $response = $this->client->send($request);