diff --git a/Controller.php b/Controller.php
index 261b03c..2a352c7 100644
--- a/Controller.php
+++ b/Controller.php
@@ -59,6 +59,14 @@ class Controller extends ModuleAbstract implements WebInterface
      */
     /* public */ const MODULE_NAME = 'Navigation';
 
+    /**
+     * Module id.
+     *
+     * @var int
+     * @since 1.0.0
+     */
+    /* public */ const MODULE_ID = 1000500000;
+
     /**
      * Providing.
      *