diff --git a/modules/backend/classes/FormField.php b/modules/backend/classes/FormField.php
index 4fab49b49..938b4b7eb 100644
--- a/modules/backend/classes/FormField.php
+++ b/modules/backend/classes/FormField.php
@@ -93,7 +93,7 @@ class FormField
     /**
      * @var bool Specifies if this field is mandatory.
      */
-    public $required = false;
+    public $required = null;
 
     /**
      * @var bool Specify if the field is read-only or not.
diff --git a/modules/backend/widgets/Form.php b/modules/backend/widgets/Form.php
index a94264871..1e7eac331 100644
--- a/modules/backend/widgets/Form.php
+++ b/modules/backend/widgets/Form.php
@@ -699,7 +699,7 @@ class Form extends WidgetBase
         /*
          * Check model if field is required
          */
-        if (!$field->required && $this->model && method_exists($this->model, 'isAttributeRequired')) {
+        if ($field->required === null && $this->model && method_exists($this->model, 'isAttributeRequired')) {
             $field->required = $this->model->isAttributeRequired($field->fieldName);
         }