diff --git a/src/Symfony/Component/Validator/ValidatorBuilder.php b/src/Symfony/Component/Validator/ValidatorBuilder.php
index 3f82ee2078..284f2a5b5b 100644
--- a/src/Symfony/Component/Validator/ValidatorBuilder.php
+++ b/src/Symfony/Component/Validator/ValidatorBuilder.php
@@ -12,7 +12,6 @@
 namespace Symfony\Component\Validator;
 
 use Doctrine\Common\Annotations\AnnotationReader;
-use Doctrine\Common\Annotations\AnnotationRegistry;
 use Doctrine\Common\Annotations\CachedReader;
 use Doctrine\Common\Annotations\Reader;
 use Doctrine\Common\Cache\ArrayCache;
@@ -367,20 +366,6 @@ class ValidatorBuilder implements ValidatorBuilderInterface
 
             if ($this->annotationReader) {
                 $loaders[] = new AnnotationLoader($this->annotationReader);
-
-                AnnotationRegistry::registerLoader(function ($class) {
-                    if (0 === strpos($class, __NAMESPACE__.'\\Constraints\\')) {
-                        $file = str_replace(__NAMESPACE__.'\\Constraints\\', __DIR__.'/Constraints/', $class).'.php';
-
-                        if (is_file($file)) {
-                            require_once $file;
-
-                            return true;
-                        }
-                    }
-
-                    return false;
-                });
             }
 
             $loader = null;