diff --git a/src/Symfony/Bridge/Twig/Extension/AssetExtension.php b/src/Symfony/Bridge/Twig/Extension/AssetExtension.php
index d138b1de1e..f7b9c87500 100644
--- a/src/Symfony/Bridge/Twig/Extension/AssetExtension.php
+++ b/src/Symfony/Bridge/Twig/Extension/AssetExtension.php
@@ -108,11 +108,15 @@ class AssetExtension extends \Twig_Extension
             $v->setAccessible(true);
             $currentVersionStrategy = $v->getValue($package);
 
-            $f = new \ReflectionProperty($currentVersionStrategy, 'format');
-            $f->setAccessible(true);
-            $format = $f->getValue($currentVersionStrategy);
+            if (property_exists($currentVersionStrategy, 'format')) {
+                $f = new \ReflectionProperty($currentVersionStrategy, 'format');
+                $f->setAccessible(true);
+                $format = $f->getValue($currentVersionStrategy);
 
-            $v->setValue($package, new StaticVersionStrategy($version, $format));
+                $v->setValue($package, new StaticVersionStrategy($version, $format));
+            } else {
+                $v->setValue($package, new StaticVersionStrategy($version));
+            }
         }
 
         try {
diff --git a/src/Symfony/Bridge/Twig/Tests/Extension/AssetExtensionTest.php b/src/Symfony/Bridge/Twig/Tests/Extension/AssetExtensionTest.php
index ab73179394..474d8c3395 100644
--- a/src/Symfony/Bridge/Twig/Tests/Extension/AssetExtensionTest.php
+++ b/src/Symfony/Bridge/Twig/Tests/Extension/AssetExtensionTest.php
@@ -15,6 +15,7 @@ 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\EmptyVersionStrategy;
 use Symfony\Component\Asset\VersionStrategy\StaticVersionStrategy;
 
 class AssetExtensionTest extends \PHPUnit_Framework_TestCase
@@ -41,6 +42,16 @@ class AssetExtensionTest extends \PHPUnit_Framework_TestCase
         $this->assertEquals('/foo/me.png?version=42', $extension->getAssetUrl('me.png', null, false, 42));
     }
 
+    /**
+     * @group legacy
+     */
+    public function testGetAssetUrlWithEmptyVersionStrategy()
+    {
+        $extension = $this->createExtension(new PathPackage('foo', new EmptyVersionStrategy()));
+
+        $this->assertEquals('/foo/me.png?42', $extension->getAssetUrl('me.png', null, false, 42));
+    }
+
     private function createExtension(Package $package)
     {
         $foundationExtension = $this->getMockBuilder('Symfony\Bridge\Twig\Extension\HttpFoundationExtension')->disableOriginalConstructor()->getMock();