diff --git a/cookbook/form/dynamic_form_modification.rst b/cookbook/form/dynamic_form_modification.rst
index 0e8d093e2b4..5e91c03061a 100644
--- a/cookbook/form/dynamic_form_modification.rst
+++ b/cookbook/form/dynamic_form_modification.rst
@@ -613,7 +613,6 @@ your form::
     public function buildForm(FormBuilderInterface $builder, array $options)
     {
         // ...
-        $subscriber = new AddNameFieldSubscriber($builder->getFormFactory());
         $builder->addEventSubscriber($this->registrationSportListener);
     }