diff --git a/src/Mandango/Mondator/ClassExtension.php b/src/Mandango/Mondator/ClassExtension.php
index 3600d0b..dcea121 100644
--- a/src/Mandango/Mondator/ClassExtension.php
+++ b/src/Mandango/Mondator/ClassExtension.php
@@ -335,6 +335,7 @@ protected function processTemplate(Definition $definition, $name, array $variabl
     {
         $twig = $this->getTwig();
 
+        $variables['extension'] = $this;
         $variables['options'] = $this->options;
         $variables['class'] = $this->class;
         $variables['config_class'] = $this->configClass;