diff --git a/CHANGELOG-2.1.md b/CHANGELOG-2.1.md
index 799b536899..11af5c97a2 100644
--- a/CHANGELOG-2.1.md
+++ b/CHANGELOG-2.1.md
@@ -12,7 +12,7 @@ To get the diff between two versions, go to https://github.com/symfony/symfony/c
 
 ### FrameworkBundle
 
- * added support for placeholders in route default values (replaced by the value set in the service container)
+ * added support for placeholders in route defaults and requirements (replaced by the value set in the service container)
 
 ### ClassLoader
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Routing/Router.php b/src/Symfony/Bundle/FrameworkBundle/Routing/Router.php
index aa9877ae6e..e3fb8f4e8d 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Routing/Router.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Routing/Router.php
@@ -51,24 +51,24 @@ class Router extends BaseRouter
     {
         if (null === $this->collection) {
             $this->collection = $this->container->get('routing.loader')->load($this->resource, $this->options['resource_type']);
-            $this->applyParameters($this->collection);
+            $this->resolveParameters($this->collection);
         }
 
         return $this->collection;
     }
 
     /**
-     * Replaces placeholders with service container parameter values in route defaults.
+     * Replaces placeholders with service container parameter values in route defaults and requirements.
      *
      * @param $collection
      *
      * @return void
      */
-    private function applyParameters(RouteCollection $collection)
+    private function resolveParameters(RouteCollection $collection)
     {
         foreach ($collection as $route) {
             if ($route instanceof RouteCollection) {
-                $this->applyParameters($route);
+                $this->resolveParameters($route);
             } else {
                 foreach ($route->getDefaults() as $name => $value) {
                     if (!$value || '%' !== $value[0] || '%' !== substr($value, -1)) {
@@ -80,8 +80,18 @@ class Router extends BaseRouter
                         $route->setDefault($name, $this->container->getParameter($key));
                     }
                 }
+
+                foreach ($route->getRequirements() as $name => $value) {
+                    if (!$value || '%' !== $value[0] || '%' !== substr($value, -1)) {
+                        continue;
+                    }
+
+                    $key = substr($value, 1, -1);
+                    if ($this->container->hasParameter($key)) {
+                        $route->setRequirement($name, $this->container->getParameter($key));
+                    }
+                }
             }
         }
-
     }
 }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/RouterTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/RouterTest.php
index 5d1558272e..1c264beea3 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/RouterTest.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Routing/RouterTest.php
@@ -27,24 +27,22 @@ class RoutingTest extends \PHPUnit_Framework_TestCase
             'foo1'   => '%foo',
             'foo2'   => 'foo%',
             'foo3'   => 'f%o%o',
+        ), array(
+            'foo'    => '%foo%',
+            'bar'    => '%bar%',
+            'foobar' => 'foobar',
+            'foo1'   => '%foo',
+            'foo2'   => 'foo%',
+            'foo3'   => 'f%o%o',
         )));
 
         $sc = $this->getServiceContainer($routes);
-        $sc
-            ->expects($this->at(1))
-            ->method('hasParameter')
-            ->will($this->returnValue(false))
-        ;
-        $sc
-            ->expects($this->at(2))
-            ->method('hasParameter')
-            ->will($this->returnValue(true))
-        ;
-        $sc
-            ->expects($this->at(3))
-            ->method('getParameter')
-            ->will($this->returnValue('bar'))
-        ;
+        $sc->expects($this->at(1))->method('hasParameter')->will($this->returnValue(false));
+        $sc->expects($this->at(2))->method('hasParameter')->will($this->returnValue(true));
+        $sc->expects($this->at(3))->method('getParameter')->will($this->returnValue('bar'));
+        $sc->expects($this->at(4))->method('hasParameter')->will($this->returnValue(false));
+        $sc->expects($this->at(5))->method('hasParameter')->will($this->returnValue(true));
+        $sc->expects($this->at(6))->method('getParameter')->will($this->returnValue('bar'));
 
         $router = new Router($sc, 'foo');
         $route = $router->getRouteCollection()->get('foo');
@@ -55,6 +53,13 @@ class RoutingTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals('%foo', $route->getDefault('foo1'));
         $this->assertEquals('foo%', $route->getDefault('foo2'));
         $this->assertEquals('f%o%o', $route->getDefault('foo3'));
+
+        $this->assertEquals('%foo%', $route->getRequirement('foo'));
+        $this->assertEquals('bar', $route->getRequirement('bar'));
+        $this->assertEquals('foobar', $route->getRequirement('foobar'));
+        $this->assertEquals('%foo', $route->getRequirement('foo1'));
+        $this->assertEquals('foo%', $route->getRequirement('foo2'));
+        $this->assertEquals('f%o%o', $route->getRequirement('foo3'));
     }
 
     private function getServiceContainer(RouteCollection $routes)