From ef706f40b48dcbbc9f0ed0652924c43f66b9b31e Mon Sep 17 00:00:00 2001
From: slaci <slaci1@gmail.com>
Date: Tue, 3 Jul 2018 11:05:40 +0200
Subject: [PATCH] [Twig] Make AppRuntime autoconfigurable in runtime example

---
 templating/twig_extension.rst | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/templating/twig_extension.rst b/templating/twig_extension.rst
index 3a08ec059d7..39189f59ccc 100644
--- a/templating/twig_extension.rst
+++ b/templating/twig_extension.rst
@@ -117,8 +117,10 @@ previous ``priceFilter()`` method::
 
     // src/Twig/AppRuntime.php
     namespace App\Twig;
+    
+    use Twig\Extension\RuntimeExtensionInterface;
 
-    class AppRuntime
+    class AppRuntime implements RuntimeExtensionInterface
     {
         public function __construct()
         {