diff --git a/Controller/AssetCacheKeyFilter.php b/Controller/AssetCacheKeyFilter.php
new file mode 100644
index 00000000..0ad13144
--- /dev/null
+++ b/Controller/AssetCacheKeyFilter.php
@@ -0,0 +1,50 @@
+<?php
+
+/*
+ * This file is part of the Assetic package, an OpenSky project.
+ *
+ * (c) 2010-2014 OpenSky Project Inc
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Bundle\AsseticBundle\Controller;
+
+use Assetic\Asset\AssetInterface;
+use Assetic\Filter\FilterInterface;
+use Assetic\Filter\HashableInterface;
+
+/**
+ * This is a special filter that has a noop on its load and dump methods, but
+ * implements the HashableInterface, allowing it to be used with the AssetCache
+ * to include an additional cache key component.
+ */
+class AssetCacheKeyFilter implements HashableInterface, FilterInterface
+{
+    private $cacheKey;
+
+    /**
+     * @param string $cacheKey A string to use as a cache key component
+     */
+    public function __construct($cacheKey)
+    {
+        $this->cacheKey = $cacheKey;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function hash()
+    {
+        return $this->cacheKey;
+    }
+
+    public function filterLoad(AssetInterface $asset)
+    {
+    }
+
+    public function filterDump(AssetInterface $asset)
+    {
+    }
+}
diff --git a/Controller/AsseticController.php b/Controller/AsseticController.php
index a3af5243..1475f52c 100644
--- a/Controller/AsseticController.php
+++ b/Controller/AsseticController.php
@@ -85,7 +85,9 @@ public function render(Request $request, $name, $pos = null)
             return $response;
         }
 
-        $response->setContent($this->cachifyAsset($asset)->dump());
+        $etagCacheKeyFilter = new AssetCacheKeyFilter($response->getEtag());
+
+        $response->setContent($this->cachifyAsset($asset)->dump($etagCacheKeyFilter));
 
         return $response;
     }