diff --git a/src/Symfony/Bridge/Twig/Extension/AssetExtension.php b/src/Symfony/Bridge/Twig/Extension/AssetExtension.php
index 3e9e9f6a78..b094252b08 100644
--- a/src/Symfony/Bridge/Twig/Extension/AssetExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/AssetExtension.php
@@ -98,10 +98,14 @@ class AssetExtension extends \Twig_Extension
     {
         if ($version) {
             $package = $this->packages->getPackage($packageName);
+            $class = new \ReflectionClass($package);
 
-            $v = new \ReflectionProperty($package, 'versionStrategy');
+            while ('Symfony\Component\Asset\Package' !== $class->getName()) {
+                $class = $class->getParentClass();
+            }
+
+            $v = $class->getProperty('versionStrategy');
             $v->setAccessible(true);
-
             $currentVersionStrategy = $v->getValue($package);
 
             $f = new \ReflectionProperty($currentVersionStrategy, 'format');
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/AssetExtensionTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/AssetExtensionTest.php
index 51432473d1..ab73179394 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/AssetExtensionTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/AssetExtensionTest.php
@@ -14,6 +14,7 @@ namespace Symfony\Bridge\Twig\Tests\Extension;
 use Symfony\Bridge\Twig\Extension\AssetExtension;
 use Symfony\Component\Asset\Package;
 use Symfony\Component\Asset\Packages;
+use Symfony\Component\Asset\PathPackage;
 use Symfony\Component\Asset\VersionStrategy\StaticVersionStrategy;
 
 class AssetExtensionTest extends \PHPUnit_Framework_TestCase
@@ -23,8 +24,25 @@ class AssetExtensionTest extends \PHPUnit_Framework_TestCase
      */
     public function testLegacyGetAssetUrl()
     {
-        $this->iniSet('error_reporting', -1 & ~E_USER_DEPRECATED);
+        $extension = $this->createExtension(new Package(new StaticVersionStrategy('22', '%s?version=%s')));
 
+        $this->assertEquals('me.png?version=42', $extension->getAssetUrl('me.png', null, false, '42'));
+        $this->assertEquals('http://localhost/me.png?version=22', $extension->getAssetUrl('me.png', null, true));
+        $this->assertEquals('http://localhost/me.png?version=42', $extension->getAssetUrl('me.png', null, true, '42'));
+    }
+
+    /**
+     * @group legacy
+     */
+    public function testGetAssetUrlWithPackageSubClass()
+    {
+        $extension = $this->createExtension(new PathPackage('foo', new StaticVersionStrategy('22', '%s?version=%s')));
+
+        $this->assertEquals('/foo/me.png?version=42', $extension->getAssetUrl('me.png', null, false, 42));
+    }
+
+    private function createExtension(Package $package)
+    {
         $foundationExtension = $this->getMockBuilder('Symfony\Bridge\Twig\Extension\HttpFoundationExtension')->disableOriginalConstructor()->getMock();
         $foundationExtension
             ->expects($this->any())
@@ -32,12 +50,6 @@ class AssetExtensionTest extends \PHPUnit_Framework_TestCase
             ->will($this->returnCallback(function ($arg) { return 'http://localhost/'.$arg; }))
         ;
 
-        $package = new Package(new StaticVersionStrategy('22', '%s?version=%s'));
-        $packages = new Packages($package);
-        $extension = new AssetExtension($packages, $foundationExtension);
-
-        $this->assertEquals('me.png?version=42', $extension->getAssetUrl('me.png', null, false, '42'));
-        $this->assertEquals('http://localhost/me.png?version=22', $extension->getAssetUrl('me.png', null, true));
-        $this->assertEquals('http://localhost/me.png?version=42', $extension->getAssetUrl('me.png', null, true, '42'));
+        return new AssetExtension(new Packages($package), $foundationExtension);
     }
 }