diff --git a/src/Symfony/Component/HttpKernel/CHANGELOG.md b/src/Symfony/Component/HttpKernel/CHANGELOG.md
index b96b4aefa1f21..3b40d8ae71514 100644
--- a/src/Symfony/Component/HttpKernel/CHANGELOG.md
+++ b/src/Symfony/Component/HttpKernel/CHANGELOG.md
@@ -1,6 +1,11 @@
 CHANGELOG
 =========
 
+4.3.0
+-----
+
+ * made `Symfony\Component\HttpKernel\EventListenerLocaleListener` set the default locale early
+
 4.2.0
 -----
 
diff --git a/src/Symfony/Component/HttpKernel/EventListener/LocaleListener.php b/src/Symfony/Component/HttpKernel/EventListener/LocaleListener.php
index 1067e8a0a51d9..2c8e7744afc4c 100644
--- a/src/Symfony/Component/HttpKernel/EventListener/LocaleListener.php
+++ b/src/Symfony/Component/HttpKernel/EventListener/LocaleListener.php
@@ -16,6 +16,7 @@
 use Symfony\Component\HttpFoundation\RequestStack;
 use Symfony\Component\HttpKernel\Event\FinishRequestEvent;
 use Symfony\Component\HttpKernel\Event\GetResponseEvent;
+use Symfony\Component\HttpKernel\Event\KernelEvent;
 use Symfony\Component\HttpKernel\KernelEvents;
 use Symfony\Component\Routing\RequestContextAwareInterface;
 
@@ -42,10 +43,14 @@ public function __construct(RequestStack $requestStack, string $defaultLocale =
         $this->router = $router;
     }
 
+    public function setDefaultLocale(KernelEvent $event)
+    {
+        $event->getRequest()->setDefaultLocale($this->defaultLocale);
+    }
+
     public function onKernelRequest(GetResponseEvent $event)
     {
         $request = $event->getRequest();
-        $request->setDefaultLocale($this->defaultLocale);
 
         $this->setLocale($request);
         $this->setRouterContext($request);
@@ -75,8 +80,11 @@ private function setRouterContext(Request $request)
     public static function getSubscribedEvents()
     {
         return array(
-            // must be registered after the Router to have access to the _locale
-            KernelEvents::REQUEST => array(array('onKernelRequest', 16)),
+            KernelEvents::REQUEST => array(
+                array('setDefaultLocale', 100),
+                // must be registered after the Router to have access to the _locale
+                array('onKernelRequest', 16),
+            ),
             KernelEvents::FINISH_REQUEST => array(array('onKernelFinishRequest', 0)),
         );
     }
diff --git a/src/Symfony/Component/HttpKernel/Tests/EventListener/LocaleListenerTest.php b/src/Symfony/Component/HttpKernel/Tests/EventListener/LocaleListenerTest.php
index f442235ad048d..20282766a87ae 100644
--- a/src/Symfony/Component/HttpKernel/Tests/EventListener/LocaleListenerTest.php
+++ b/src/Symfony/Component/HttpKernel/Tests/EventListener/LocaleListenerTest.php
@@ -12,10 +12,12 @@
 namespace Symfony\Component\HttpKernel\Tests\EventListener;
 
 use PHPUnit\Framework\TestCase;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpKernel\Event\GetResponseEvent;
 use Symfony\Component\HttpKernel\EventListener\LocaleListener;
 use Symfony\Component\HttpKernel\HttpKernelInterface;
+use Symfony\Component\HttpKernel\KernelEvents;
 
 class LocaleListenerTest extends TestCase
 {
@@ -26,12 +28,28 @@ protected function setUp()
         $this->requestStack = $this->getMockBuilder('Symfony\Component\HttpFoundation\RequestStack')->disableOriginalConstructor()->getMock();
     }
 
-    public function testDefaultLocaleWithoutSession()
+    public function testIsAnEventSubscriber()
+    {
+        $this->assertInstanceOf(EventSubscriberInterface::class, new LocaleListener($this->requestStack));
+    }
+
+    public function testRegisteredEvent()
+    {
+        $this->assertEquals(
+            array(
+                KernelEvents::REQUEST => array(array('setDefaultLocale', 100), array('onKernelRequest', 16)),
+                KernelEvents::FINISH_REQUEST => array(array('onKernelFinishRequest', 0)),
+            ),
+            LocaleListener::getSubscribedEvents()
+        );
+    }
+
+    public function testDefaultLocale()
     {
         $listener = new LocaleListener($this->requestStack, 'fr');
         $event = $this->getEvent($request = Request::create('/'));
 
-        $listener->onKernelRequest($event);
+        $listener->setDefaultLocale($event);
         $this->assertEquals('fr', $request->getLocale());
     }
 

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