diff --git a/src/Symfony/Bundle/FrameworkBundle/EventListener/SessionListener.php b/src/Symfony/Bundle/FrameworkBundle/EventListener/SessionListener.php
index 0c0260b243fc..b664a7297457 100644
--- a/src/Symfony/Bundle/FrameworkBundle/EventListener/SessionListener.php
+++ b/src/Symfony/Bundle/FrameworkBundle/EventListener/SessionListener.php
@@ -33,12 +33,7 @@ class SessionListener implements EventSubscriberInterface
      */
     private $container;
 
-    /**
-     * @var boolean
-     */
-    private $autoStart;
-
-    public function __construct(ContainerInterface $container, $autoStart = false)
+    public function __construct(ContainerInterface $container)
     {
         $this->container = $container;
     }
@@ -60,7 +55,7 @@ public function onKernelRequest(GetResponseEvent $event)
 
         $request->setSession($session = $this->container->get('session'));
 
-        if ($this->autoStart || $request->hasPreviousSession()) {
+        if ($request->hasPreviousSession()) {
             $session->start();
         }
     }