diff --git a/availability_timing.module b/availability_timing.module
index 1bff594..7a6fd3c 100644
--- a/availability_timing.module
+++ b/availability_timing.module
@@ -5,6 +5,8 @@
  * This file defines hook functions for availability_timing module.
  */
 
+use Drupal\Core\Routing\RouteMatchInterface;
+
 /**
  * Implements hook_help().
  */