diff --git a/core/lib/Drupal/Core/Layout/LayoutDefinition.php b/core/lib/Drupal/Core/Layout/LayoutDefinition.php
index a319313..315b43f 100644
--- a/core/lib/Drupal/Core/Layout/LayoutDefinition.php
+++ b/core/lib/Drupal/Core/Layout/LayoutDefinition.php
@@ -2,6 +2,7 @@
 
 namespace Drupal\Core\Layout;
 
+use Drupal\Component\Plugin\Definition\DerivablePluginDefinitionInterface;
 use Drupal\Component\Plugin\Definition\PluginDefinitionInterface;
 use Drupal\Component\Plugin\Definition\PluginDefinition;