diff --git a/src/Symfony/Component/Validator/Mapping/MemberMetadata.php b/src/Symfony/Component/Validator/Mapping/MemberMetadata.php
index d6e6a9bbd3..7bf12f627c 100644
--- a/src/Symfony/Component/Validator/Mapping/MemberMetadata.php
+++ b/src/Symfony/Component/Validator/Mapping/MemberMetadata.php
@@ -76,6 +76,7 @@ abstract class MemberMetadata extends ElementMetadata
             'property',
             'cascaded',
             'collectionCascaded',
+            'collectionCascadedDeeply',
         ));
     }
 
diff --git a/src/Symfony/Component/Validator/Tests/Mapping/MemberMetadataTest.php b/src/Symfony/Component/Validator/Tests/Mapping/MemberMetadataTest.php
index 2606c0d663..23f5c96ff7 100644
--- a/src/Symfony/Component/Validator/Tests/Mapping/MemberMetadataTest.php
+++ b/src/Symfony/Component/Validator/Tests/Mapping/MemberMetadataTest.php
@@ -72,7 +72,16 @@ class MemberMetadataTest extends \PHPUnit_Framework_TestCase
 
     public function testSerializeCollectionCascaded()
     {
-        $this->metadata->addConstraint(new Valid(array('traverse' => true)));
+        $this->metadata->addConstraint(new Valid(array('traverse' => true, 'deep' => false)));
+
+        $metadata = unserialize(serialize($this->metadata));
+
+        $this->assertEquals($this->metadata, $metadata);
+    }
+
+    public function testSerializeCollectionCascadedDeeply()
+    {
+        $this->metadata->addConstraint(new Valid(array('traverse' => true, 'deep' => true)));
 
         $metadata = unserialize(serialize($this->metadata));