diff --git a/lib/AutodiscoverJson.php b/lib/AutodiscoverJson.php
index 0800532..f210f35 100644
--- a/lib/AutodiscoverJson.php
+++ b/lib/AutodiscoverJson.php
@@ -1,85 +1,85 @@
 <?php
 
 /**
  +--------------------------------------------------------------------------+
  | Kolab Autodiscover Service                                               |
  |                                                                          |
  | Copyright (C) 2011-2014, Kolab Systems AG <contact@kolabsys.com>         |
  |                                                                          |
  | This program is free software: you can redistribute it and/or modify     |
  | it under the terms of the GNU General Public License as published by     |
  | the Free Software Foundation, either version 3 of the License, or        |
  | (at your option) any later version.                                      |
  |                                                                          |
  | This program is distributed in the hope that it will be useful,          |
  | but WITHOUT ANY WARRANTY; without even the implied warranty of           |
  | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the             |
  | GNU General Public License for more details.                             |
  |                                                                          |
  | You should have received a copy of the GNU General Public License        |
  | along with this program. If not, see http://www.gnu.org/licenses/.       |
  +--------------------------------------------------------------------------+
  | Author: Daniel Hoffend <dh@dotlan.net>                                   |
  +--------------------------------------------------------------------------+
 */
 
 /**
  * Autodiscover Service class for Microsoft Autodiscover V2
  */
 class AutodiscoverJson extends Autodiscover
 {
 
     public function handle_request()
     {
         if (preg_match('|autodiscover.json/v1.0/([^\?]+)|', $_SERVER['REQUEST_URI'], $regs)) {
             $this->email = $regs[1];
         }
         else if (!empty($_GET['Email'])) {
             $this->email = $_GET['Email'];
         }
 
         Log::debug('Request [json]: ' . $_SERVER['REQUEST_URI']);
     }
 
     /**
      * Generates JSON response
      */
     protected function handle_response()
     {
         if (strtolower($_GET['Protocol']) == 'activesync'
             && !empty($this->config['activesync'])
         ) {
             if (!preg_match('/^https?:/i', $this->config['activesync'])) {
                 $this->config['activesync'] = 'https://' . $this->config['activesync'] . '/Microsoft-Server-ActiveSync';
             }
             $json = array(
                 'Protocol' => 'ActiveSync',
                 'Url' => $this->config['activesync']
             );
         }
         elseif (strtolower($_GET['Protocol']) == 'autodiscoverv1') {
             $json = array(
                 'Protocol' => 'Autodiscoverv1',
                 'Url' => 'https://' . $_SERVER['HTTP_HOST'] . '/Autodiscover/Autodiscover.xml'
             );
         }
         else {
             http_response_code(400);
             $json = array(
-                'ErrorCore' => 'InvalidProtocol',
+                'ErrorCode' => 'InvalidProtocol',
                 'ErrorMessage' => 'The given protocol value \u0027'
                     . $_GET['Protocol']
                     . '\u0027 is invalid. Supported values are \u0027'
                     . (!empty($this->config['activesync']) ? 'ActiveSync,' : '')
                     . 'AutodiscoverV1\u0027'
             );
         }
 
         $response = json_encode($json, JSON_PRETTY_PRINT);
         Log::debug('Response [json]: ' . $response);
 
         header('Content-Type: application/json; charset=' . Autodiscover::CHARSET);
         echo $response;
         exit;
     }
 }