diff --git a/components/form.rst b/components/form.rst
index 9590929848b..4b8a2500fc6 100644
--- a/components/form.rst
+++ b/components/form.rst
@@ -134,7 +134,7 @@ The following snippet adds CSRF protection to the form factory::
 
     $formFactory = Forms::createFormFactoryBuilder()
         // ...
-        ->addExtension(new CsrfExtension($csrfStorage))
+        ->addExtension(new CsrfExtension($csrfManager))
         ->getFormFactory();
 
 Internally, this extension will automatically add a hidden field to every