diff --git a/htdocs/product/class/product.class.php b/htdocs/product/class/product.class.php
index 11cbfa9ff14..8d65a88acad 100644
--- a/htdocs/product/class/product.class.php
+++ b/htdocs/product/class/product.class.php
@@ -2788,11 +2788,10 @@ class Product extends CommonObject
     public function load_stats_facture($socid = 0)
     {
         // phpcs:enable
-        global $conf;
-        global $user;
+        global $db, $conf, $user;
 
         $sql = "SELECT COUNT(DISTINCT f.fk_soc) as nb_customers, COUNT(DISTINCT f.rowid) as nb,";
-        $sql.= " COUNT(fd.rowid) as nb_rows, SUM(fd.qty) as qty";
+        $sql.= " COUNT(fd.rowid) as nb_rows, SUM(".$db->ifsql('f.type != 2', 'fd.qty', 'fd.qty * -1').") as qty";
         $sql.= " FROM ".MAIN_DB_PREFIX."facturedet as fd";
         $sql.= ", ".MAIN_DB_PREFIX."facture as f";
         $sql.= ", ".MAIN_DB_PREFIX."societe as s";