diff --git a/src/Ratchet/Http/Router.php b/src/Ratchet/Http/Router.php
index e1c1f6d..08e0c1a 100644
--- a/src/Ratchet/Http/Router.php
+++ b/src/Ratchet/Http/Router.php
@@ -2,6 +2,7 @@
 namespace Ratchet\Http;
 use Ratchet\ConnectionInterface;
 use Guzzle\Http\Message\RequestInterface;
+use Guzzle\Http\Message\Response;
 use Symfony\Component\Routing\Matcher\UrlMatcherInterface;
 use Symfony\Component\Routing\Exception\MethodNotAllowedException;
 use Symfony\Component\Routing\Exception\ResourceNotFoundException;
@@ -18,6 +19,7 @@ class Router implements HttpServerInterface {
 
     /**
      * {@inheritdoc}
+     * @throws \UnexpectedValueException If a controller is not \Ratchet\Http\HttpServerInterface
      */
     public function onOpen(ConnectionInterface $conn, RequestInterface $request = null) {
         if (null === $request) {
@@ -27,9 +29,9 @@ class Router implements HttpServerInterface {
         try {
             $route = $this->_matcher->match($request->getPath());
         } catch (MethodNotAllowedException $nae) {
-            return $this->close($from, 403);
+            return $this->close($conn, 403);
         } catch (ResourceNotFoundException $nfe) {
-            return $this->close($from, 404);
+            return $this->close($conn, 404);
         }
 
         if (is_string($route['_controller']) && class_exists($route['_controller'])) {
@@ -37,7 +39,7 @@ class Router implements HttpServerInterface {
         }
 
         if (!($route['_controller'] instanceof HttpServerInterface)) {
-            throw new \UnexpectedValueException('All routes must implement Ratchet\HttpServerInterface');
+            throw new \UnexpectedValueException('All routes must implement Ratchet\Http\HttpServerInterface');
         }
 
         $conn->controller = $route['_controller'];
@@ -64,4 +66,19 @@ class Router implements HttpServerInterface {
     function onError(ConnectionInterface $conn, \Exception $e) {
         $conn->controller->onError($conn, $e);
     }
+
+    /**
+     * Close a connection with an HTTP response
+     * @param \Ratchet\ConnectionInterface $conn
+     * @param int                          $code HTTP status code
+     * @return null
+     */
+    protected function close(ConnectionInterface $conn, $code = 400) {
+        $response = new Response($code, array(
+            'X-Powered-By' => \Ratchet\VERSION
+        ));
+
+        $conn->send((string)$response);
+        $conn->close();
+    }
 }
\ No newline at end of file