diff --git a/htdocs/product/class/product.class.php b/htdocs/product/class/product.class.php
index 0271e0c0d2c..f17a128544a 100644
--- a/htdocs/product/class/product.class.php
+++ b/htdocs/product/class/product.class.php
@@ -3005,7 +3005,7 @@ class Product extends CommonObject
 	 *
 	 * @param  int    $socid           Id societe pour filtrer sur une societe
 	 * @param  string $filtrestatut    Id statut pour filtrer sur un statut
-	 * @param  int    $forVirtualStock Ignore rights filter for virtual stock calculation.
+	 * @param  int    $forVirtualStock Ignore rights filter for virtual stock calculation. Set when load_stats_commande is used for virtual stock calculation.
 	 * @return integer                 Array of stats in $this->stats_commande (nb=nb of order, qty=qty ordered), <0 if ko or >0 if ok
 	 */
 	public function load_stats_commande($socid = 0, $filtrestatut = '', $forVirtualStock = 0)
@@ -3065,10 +3065,10 @@ class Product extends CommonObject
 			}
 
 			// If stock decrease is on invoice validation, the theorical stock continue to
-			// count the orders to ship in theorical stock when some are already removed b invoice validation.
-			// If option DECREASE_ONLY_UNINVOICEDPRODUCTS is on, we make a compensation.
-			if (!empty($conf->global->STOCK_CALCULATE_ON_BILL)) {
+			// count the orders to ship in theorical stock when some are already removed by invoice validation.
+			if ($forVirtualStock && !empty($conf->global->STOCK_CALCULATE_ON_BILL)) {
 				if (!empty($conf->global->DECREASE_ONLY_UNINVOICEDPRODUCTS)) {
+					// If option DECREASE_ONLY_UNINVOICEDPRODUCTS is on, we make a compensation but only if order not yet invoice.
 					$adeduire = 0;
 					$sql = "SELECT sum(fd.qty) as count FROM ".$this->db->prefix()."facturedet as fd ";
 					$sql .= " JOIN ".$this->db->prefix()."facture as f ON fd.fk_facture = f.rowid ";
@@ -3086,6 +3086,7 @@ class Product extends CommonObject
 
 					$this->stats_commande['qty'] -= $adeduire;
 				} else {
+					// If option DECREASE_ONLY_UNINVOICEDPRODUCTS is off, we make a compensation with lines of invoices linked to the order
 					include_once DOL_DOCUMENT_ROOT.'/compta/facture/class/facture.class.php';
 
 					// For every order having invoice already validated we need to decrease stock cause it's in physical stock