diff --git a/htdocs/product/class/product.class.php b/htdocs/product/class/product.class.php
index 3b34af84ed5..580983d03c0 100644
--- a/htdocs/product/class/product.class.php
+++ b/htdocs/product/class/product.class.php
@@ -651,9 +651,25 @@ class Product extends CommonObject
 	 * @var array{}|array{nb_toproduce:int,nb_toconsume:int,qty_toproduce:float,qty_toconsume:float}
 	 */
 	public $stats_bom = array();
+
+	/**
+	 * @var array{}
+	 */
 	public $stats_mrptoconsume = array();
+
+	/**
+	 * @var array{}
+	 */
 	public $stats_mrptoproduce = array();
+
+	/**
+	 * @var array{}
+	 */
 	public $stats_facturerec = array();
+
+	/**
+	 * @var array{}
+	 */
 	public $stats_facture_fournisseur = array();
 
 	/**