diff --git a/src/Form/AttachmentFormType.php b/src/Form/AttachmentFormType.php
index 4eb0b0f8..9a1f541b 100644
--- a/src/Form/AttachmentFormType.php
+++ b/src/Form/AttachmentFormType.php
@@ -88,6 +88,7 @@ class AttachmentFormType extends AbstractType
                 //Disable browser autocomplete
                 'autocomplete' => 'off'
             ],
+            'help' => $this->trans->trans('attachment.edit.url.help'),
             'constraints' => [
                 $options['allow_builtins'] ? new UrlOrBuiltin() : new Url()
             ]