diff --git a/src/Symfony/Bundle/FrameworkBundle/CHANGELOG.md b/src/Symfony/Bundle/FrameworkBundle/CHANGELOG.md
index 4c91ff11be..4fc04f0671 100644
--- a/src/Symfony/Bundle/FrameworkBundle/CHANGELOG.md
+++ b/src/Symfony/Bundle/FrameworkBundle/CHANGELOG.md
@@ -17,6 +17,7 @@ CHANGELOG
    to the `session` section of the configuration
  * Added support for Translator paths, Twig paths in translation commands.
  * Added support for PHP files with translations in translation commands.
+ * Added support for boolean container parameters within routes.
 
 4.2.0
 -----
diff --git a/src/Symfony/Bundle/FrameworkBundle/Routing/Router.php b/src/Symfony/Bundle/FrameworkBundle/Routing/Router.php
index 6bea82e1ef..2f252846b7 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Routing/Router.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Routing/Router.php
@@ -164,6 +164,10 @@ class Router extends BaseRouter implements WarmableInterface, ServiceSubscriberI
 
             $resolved = ($this->paramFetcher)($match[1]);
 
+            if (\is_bool($resolved)) {
+                $resolved = (string) (int) $resolved;
+            }
+
             if (\is_string($resolved) || is_numeric($resolved)) {
                 $this->collectedParameters[$match[1]] = $resolved;
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/RouterTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/RouterTest.php
index 329f1e7cba..b2b848a7e2 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/RouterTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/RouterTest.php
@@ -27,7 +27,7 @@ class RouterTest extends TestCase
      */
     public function testConstructThrowsOnNonSymfonyNorPsr11Container()
     {
-        new Router($this->getMockBuilder(ContainerInterface::class)->getMock(), 'foo');
+        new Router($this->createMock(ContainerInterface::class), 'foo');
     }
 
     public function testGenerateWithServiceParam()
@@ -447,6 +447,24 @@ class RouterTest extends TestCase
         $this->assertEquals([new ContainerParametersResource(['locale' => 'en'])], $routeCollection->getResources());
     }
 
+    public function testBooleanContainerParametersWithinRouteCondition()
+    {
+        $routes = new RouteCollection();
+
+        $route = new Route('foo');
+        $route->setCondition('%parameter.true% or %parameter.false%');
+
+        $routes->add('foo', $route);
+
+        $sc = $this->getPsr11ServiceContainer($routes);
+        $parameters = $this->getParameterBag(['parameter.true' => true, 'parameter.false' => false]);
+
+        $router = new Router($sc, 'foo', [], null, $parameters);
+        $route = $router->getRouteCollection()->get('foo');
+
+        $this->assertSame('1 or 0', $route->getCondition());
+    }
+
     public function getNonStringValues()
     {
         return [[null], [false], [true], [new \stdClass()], [['foo', 'bar']], [[[]]]];