diff --git a/i.php b/i.php
index 1416b4240..246c7c06c 100644
--- a/i.php
+++ b/i.php
@@ -361,9 +361,7 @@ function send_derivative($expires)
     include_once(PHPWG_ROOT_PATH.'include/functions_cookie.inc.php');
     include_once(PHPWG_ROOT_PATH.'include/functions_url.inc.php');
 
-    $response = new json_response();
-    $response->url = embellish_url(get_absolute_root_url().$page['derivative_path']);
-    echo json_encode($response);
+    echo json_encode( array( 'url'=>embellish_url(get_absolute_root_url().$page['derivative_path']) ) );
     return;
   }
   $fp = fopen($page['derivative_path'], 'rb');
@@ -390,11 +388,6 @@ function send_derivative($expires)
   fclose($fp);
 }
 
-class json_response
-{
-  var $url;
-}
-
 $page=array();
 $begin = $step = microtime(true);
 $timing=array();