diff --git a/Framework/View/TemplateEngine/Twig.php b/Framework/View/TemplateEngine/Twig.php
index 07726bd..d7b6635 100644
--- a/Framework/View/TemplateEngine/Twig.php
+++ b/Framework/View/TemplateEngine/Twig.php
@@ -108,7 +108,7 @@ private function initTwig()
 
         $this->twig->addFilter(new TwigFilter('trans', '__'));
         $this->twig->addExtension(new DebugExtension());
-        $twig->addExtension(new StringExtension());
+        $this->twig->addExtension(new StringExtension());
         $this->eventManager->dispatch('twig_init', ['twig' => $this->twig]);
     }