diff --git a/src/Symfony/Bundle/FrameworkBundle/DataCollector/AjaxDataCollector.php b/src/Symfony/Bundle/FrameworkBundle/DataCollector/AjaxDataCollector.php
index 53945eafc8..f44c8f5aaf 100644
--- a/src/Symfony/Bundle/FrameworkBundle/DataCollector/AjaxDataCollector.php
+++ b/src/Symfony/Bundle/FrameworkBundle/DataCollector/AjaxDataCollector.php
@@ -13,10 +13,14 @@ namespace Symfony\Bundle\FrameworkBundle\DataCollector;
 
 use Symfony\Component\HttpKernel\DataCollector\AjaxDataCollector as BaseAjaxDataCollector;
 
+@trigger_error('The '.__NAMESPACE__.'\AjaxDataCollector class is deprecated since version 2.8 and will be removed in 3.0. Use Symfony\Component\HttpKernel\DataCollector\AjaxDataCollector instead.', E_USER_DEPRECATED);
+
 /**
  * AjaxDataCollector.
  *
  * @author Bart van den Burg <bart@burgov.nl>
+ *
+ * @deprecated since version 2.8, to be removed in 3.0.
  */
 class AjaxDataCollector extends BaseAjaxDataCollector
 {