diff --git a/Resources/config/routing.xml b/Resources/config/routing.xml
index 9cad97d98..ea12c693d 100644
--- a/Resources/config/routing.xml
+++ b/Resources/config/routing.xml
@@ -71,6 +71,7 @@
             <argument type="service" id="router.request_context" on-invalid="ignore" />
             <argument type="service" id="parameter_bag" on-invalid="ignore" />
             <argument type="service" id="logger" on-invalid="ignore" />
+            <argument>%kernel.default_locale%</argument>
             <call method="setConfigCacheFactory">
                 <argument type="service" id="config_cache_factory" />
             </call>
diff --git a/Routing/Router.php b/Routing/Router.php
index 6bea82e1e..93e6c3ad8 100644
--- a/Routing/Router.php
+++ b/Routing/Router.php
@@ -43,7 +43,7 @@ class Router extends BaseRouter implements WarmableInterface, ServiceSubscriberI
      * @param ContainerInterface|null $parameters A ContainerInterface instance allowing to fetch parameters
      * @param LoggerInterface|null    $logger
      */
-    public function __construct(ContainerInterface $container, $resource, array $options = [], RequestContext $context = null, ContainerInterface $parameters = null, LoggerInterface $logger = null)
+    public function __construct(ContainerInterface $container, $resource, array $options = [], RequestContext $context = null, ContainerInterface $parameters = null, LoggerInterface $logger = null, string $defaultLocale = null)
     {
         $this->container = $container;
         $this->resource = $resource;
@@ -58,6 +58,8 @@ public function __construct(ContainerInterface $container, $resource, array $opt
         } else {
             throw new \LogicException(sprintf('You should either pass a "%s" instance or provide the $parameters argument of the "%s" method.', SymfonyContainerInterface::class, __METHOD__));
         }
+
+        $this->defaultLocale = $defaultLocale;
     }
 
     /**
diff --git a/Tests/Routing/RouterTest.php b/Tests/Routing/RouterTest.php
index 329f1e7cb..3f04e46dd 100644
--- a/Tests/Routing/RouterTest.php
+++ b/Tests/Routing/RouterTest.php
@@ -82,6 +82,32 @@ public function testGenerateWithServiceParamWithSfContainer()
         $this->assertSame('"bar" == "bar"', $router->getRouteCollection()->get('foo')->getCondition());
     }
 
+    public function testGenerateWithDefaultLocale()
+    {
+        $routes = new RouteCollection();
+
+        $route = new Route('');
+
+        $name = 'testFoo';
+
+        foreach (['hr' => '/test-hr', 'en' => '/test-en'] as $locale => $path) {
+            $localizedRoute = clone $route;
+            $localizedRoute->setDefault('_locale', $locale);
+            $localizedRoute->setDefault('_canonical_route', $name);
+            $localizedRoute->setPath($path);
+            $routes->add($name.'.'.$locale, $localizedRoute);
+        }
+
+        $sc = $this->getServiceContainer($routes);
+
+        $router = new Router($sc, '', [], null, null, null, 'hr');
+
+        $this->assertSame('/test-hr', $router->generate($name));
+
+        $this->assertSame('/test-en', $router->generate($name, ['_locale' => 'en']));
+        $this->assertSame('/test-hr', $router->generate($name, ['_locale' => 'hr']));
+    }
+
     public function testDefaultsPlaceholders()
     {
         $routes = new RouteCollection();
diff --git a/composer.json b/composer.json
index 44bb6b039..9921bf6a7 100644
--- a/composer.json
+++ b/composer.json
@@ -28,7 +28,7 @@
         "symfony/polyfill-mbstring": "~1.0",
         "symfony/filesystem": "~3.4|~4.0",
         "symfony/finder": "~3.4|~4.0",
-        "symfony/routing": "^4.1"
+        "symfony/routing": "^4.2.6"
     },
     "require-dev": {
         "doctrine/cache": "~1.0",