diff --git a/src/Symfony/Component/Config/Resource/BCResourceInterfaceChecker.php b/src/Symfony/Component/Config/Resource/BCResourceInterfaceChecker.php
index 631755e8fe..565ff8bb50 100644
--- a/src/Symfony/Component/Config/Resource/BCResourceInterfaceChecker.php
+++ b/src/Symfony/Component/Config/Resource/BCResourceInterfaceChecker.php
@@ -29,7 +29,7 @@ class BCResourceInterfaceChecker extends SelfCheckingResourceChecker
 
     public function isFresh(ResourceInterface $resource, $timestamp)
     {
-        @trigger_error('Resource checking through ResourceInterface::isFresh() is deprecated since 2.8 and will be removed in 3.0', E_USER_DEPRECATED);
+        @trigger_error(sprintf('The class "%s" is performing resource checking through ResourceInterface::isFresh(), which is deprecated since 2.8 and will be removed in 3.0', get_class($resource)), E_USER_DEPRECATED);
 
         return parent::isFresh($resource, $timestamp); // For now, $metadata features the isFresh() method, so off we go (quack quack)
     }