diff --git a/Models/Employee.php b/Models/Employee.php
index a77d7ab..b4ca280 100644
--- a/Models/Employee.php
+++ b/Models/Employee.php
@@ -36,7 +36,7 @@ class Employee implements ArrayableInterface, \JsonSerializable
      * @var int
      * @since 1.0.0
      */
-    private int $id = 0;
+    protected int $id = 0;
 
     /**
      * Account profile.
diff --git a/Models/NullEmployee.php b/Models/NullEmployee.php
index 810b9b1..c822a79 100644
--- a/Models/NullEmployee.php
+++ b/Models/NullEmployee.php
@@ -24,4 +24,16 @@ namespace Modules\HumanResourceManagement\Models;
  */
 final class NullEmployee extends Employee
 {
+    /**
+     * Constructor
+     *
+     * @param int $id Model id
+     *
+     * @since 1.0.0
+     */
+    public function __construct(int $id = 0)
+    {
+        $this->id = $id;
+        parent::__construct();
+    }
 }