diff --git a/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php b/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php
index d6ce2a79de..1f5a3322e1 100644
--- a/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php
+++ b/src/Symfony/Component/HttpFoundation/Session/Storage/NativeSessionStorage.php
@@ -213,8 +213,10 @@ class NativeSessionStorage implements SessionStorageInterface
             return false;
         }
 
-        if (null !== $lifetime) {
+        if (null !== $lifetime && $lifetime != ini_get('session.cookie_lifetime')) {
+            $this->save();
             ini_set('session.cookie_lifetime', $lifetime);
+            $this->start();
         }
 
         if ($destroy) {
diff --git a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/NativeSessionStorageTest.php b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/NativeSessionStorageTest.php
index d2cf324525..7cfcd223e0 100644
--- a/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/NativeSessionStorageTest.php
+++ b/src/Symfony/Component/HttpFoundation/Tests/Session/Storage/NativeSessionStorageTest.php
@@ -123,6 +123,19 @@ class NativeSessionStorageTest extends TestCase
         $this->assertEquals(11, $storage->getBag('attributes')->get('legs'));
     }
 
+    public function testRegenerateWithCustomLifetime()
+    {
+        $storage = $this->getStorage();
+        $storage->start();
+        $id = $storage->getId();
+        $lifetime = 999999;
+        $storage->getBag('attributes')->set('legs', 11);
+        $storage->regenerate(false, $lifetime);
+        $this->assertNotEquals($id, $storage->getId());
+        $this->assertEquals(11, $storage->getBag('attributes')->get('legs'));
+        $this->assertEquals($lifetime, ini_get('session.cookie_lifetime'));
+    }
+
     public function testSessionGlobalIsUpToDateAfterIdRegeneration()
     {
         $storage = $this->getStorage();