diff --git a/app/Models/Item_quantity.php b/app/Models/Item_quantity.php
index 20c169c05..3fabbb25e 100644
--- a/app/Models/Item_quantity.php
+++ b/app/Models/Item_quantity.php
@@ -18,6 +18,10 @@ class Item_quantity extends Model
 		'quantity'
 	];
 
+	protected $item_id;
+	protected $location_id;
+	protected $quantity;
+
 	/**
 	 * @param int $item_id
 	 * @param int $location_id