diff --git a/forms.rst b/forms.rst
index 8d39df0a113..6d234b482a1 100644
--- a/forms.rst
+++ b/forms.rst
@@ -968,6 +968,8 @@ example to add an *"I agree with these terms"* checkbox), set the ``mapped``
 option to ``false`` in those fields::
 
     // ...
+    use Symfony\Component\Form\Extension\Core\Type\CheckboxType;
+    use Symfony\Component\Form\Extension\Core\Type\SubmitType;
     use Symfony\Component\Form\FormBuilderInterface;
 
     class TaskType extends AbstractType