diff --git a/core/modules/layout_builder/src/Controller/LayoutBuilderHtmlEntityFormController.php b/core/modules/layout_builder/src/Controller/LayoutBuilderHtmlEntityFormController.php
index eac8695a64..5a3ea7d712 100644
--- a/core/modules/layout_builder/src/Controller/LayoutBuilderHtmlEntityFormController.php
+++ b/core/modules/layout_builder/src/Controller/LayoutBuilderHtmlEntityFormController.php
@@ -11,7 +11,7 @@
 /**
  * Overrides the entity form controller service for layout builder operations.
  */
-class LayoutBuilderHtmlEntityFormController {
+class LayoutBuilderHtmlEntityFormController extends FormController {
 
   use DependencySerializationTrait;
 
@@ -56,4 +56,18 @@ public function getContentResult(Request $request, RouteMatchInterface $route_ma
     return $form;
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  protected function getFormArgument(RouteMatchInterface $route_match) {
+    return $this->entityFormController->getFormArgument($route_match);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function getFormObject(RouteMatchInterface $route_match, $form_arg) {
+    return $this->entityFormController->getFormObject($route_match, $form_arg);
+  }
+
 }