diff --git a/src/Symfony/Component/Serializer/Normalizer/AbstractObjectNormalizer.php b/src/Symfony/Component/Serializer/Normalizer/AbstractObjectNormalizer.php
index 08fbc5fa3f..25d6ff6a9d 100644
--- a/src/Symfony/Component/Serializer/Normalizer/AbstractObjectNormalizer.php
+++ b/src/Symfony/Component/Serializer/Normalizer/AbstractObjectNormalizer.php
@@ -31,7 +31,6 @@ abstract class AbstractObjectNormalizer extends AbstractNormalizer
 {
     const ENABLE_MAX_DEPTH = 'enable_max_depth';
     const DEPTH_KEY_PATTERN = 'depth_%s::%s';
-    const ALLOW_EXTRA_ATTRIBUTES = 'allow_extra_attributes';
     const DISABLE_TYPE_ENFORCEMENT = 'disable_type_enforcement';
 
     private $propertyTypeExtractor;