diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php b/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php
index 36a20550b0..987f2f25b4 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php
@@ -340,6 +340,7 @@ class NativeSessionStorage implements SessionStorageInterface
             'use_only_cookies', 'use_trans_sid', 'upload_progress.enabled',
             'upload_progress.cleanup', 'upload_progress.prefix', 'upload_progress.name',
             'upload_progress.freq', 'upload_progress.min-freq', 'url_rewriter.tags',
+            'sid_length', 'sid_bits_per_character', 'trans_sid_hosts', 'trans_sid_tags',
         ));
 
         foreach ($options as $key => $value) {