diff --git a/src/Symfony/Component/Routing/Route.php b/src/Symfony/Component/Routing/Route.php
index 6d1b1fbec9f8f..69a7cade10c33 100644
--- a/src/Symfony/Component/Routing/Route.php
+++ b/src/Symfony/Component/Routing/Route.php
@@ -116,7 +116,7 @@ public function serialize()
      */
     public function unserialize($serialized)
     {
-        $data = unserialize($serialized, array('allowed_classes' => array(CompiledRoute::class)));
+        $data = unserialize($serialized);
         $this->path = $data['path'];
         $this->host = $data['host'];
         $this->defaults = $data['defaults'];
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/CustomCompiledRoute.php b/src/Symfony/Component/Routing/Tests/Fixtures/CustomCompiledRoute.php
new file mode 100644
index 0000000000000..0f6e198c923d9
--- /dev/null
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/CustomCompiledRoute.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Routing\Tests\Fixtures;
+
+use Symfony\Component\Routing\CompiledRoute;
+
+class CustomCompiledRoute extends CompiledRoute
+{
+}
diff --git a/src/Symfony/Component/Routing/Tests/Fixtures/CustomRouteCompiler.php b/src/Symfony/Component/Routing/Tests/Fixtures/CustomRouteCompiler.php
new file mode 100644
index 0000000000000..c2e2afd9afcd9
--- /dev/null
+++ b/src/Symfony/Component/Routing/Tests/Fixtures/CustomRouteCompiler.php
@@ -0,0 +1,26 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Routing\Tests\Fixtures;
+
+use Symfony\Component\Routing\Route;
+use Symfony\Component\Routing\RouteCompiler;
+
+class CustomRouteCompiler extends RouteCompiler
+{
+    /**
+     * {@inheritdoc}
+     */
+    public static function compile(Route $route)
+    {
+        return new CustomCompiledRoute('', '', array(), array());
+    }
+}
diff --git a/src/Symfony/Component/Routing/Tests/RouteTest.php b/src/Symfony/Component/Routing/Tests/RouteTest.php
index b65dfb54085c1..ff7e320c5fc95 100644
--- a/src/Symfony/Component/Routing/Tests/RouteTest.php
+++ b/src/Symfony/Component/Routing/Tests/RouteTest.php
@@ -220,6 +220,24 @@ public function testSerializeWhenCompiled()
         $this->assertNotSame($route, $unserialized);
     }
 
+    /**
+     * Tests that unserialization does not fail when the compiled Route is of a
+     * class other than CompiledRoute, such as a subclass of it.
+     */
+    public function testSerializeWhenCompiledWithClass()
+    {
+        $route = new Route('/', array(), array(), array('compiler_class' => '\Symfony\Component\Routing\Tests\Fixtures\CustomRouteCompiler'));
+        $this->assertInstanceOf('\Symfony\Component\Routing\Tests\Fixtures\CustomCompiledRoute', $route->compile(), '->compile() returned a proper route');
+
+        $serialized = serialize($route);
+        try {
+            $unserialized = unserialize($serialized);
+            $this->assertInstanceOf('\Symfony\Component\Routing\Tests\Fixtures\CustomCompiledRoute', $unserialized->compile(), 'the unserialized route compiled successfully');
+        } catch (\Exception $e) {
+            $this->fail('unserializing a route which uses a custom compiled route class');
+        }
+    }
+
     /**
      * Tests that the serialized representation of a route in one symfony version
      * also works in later symfony versions, i.e. the unserialized route is in the