diff --git a/htdocs/fourn/commande/dispatch.php b/htdocs/fourn/commande/dispatch.php
index 761cce030f7..77fd4b1aa69 100644
--- a/htdocs/fourn/commande/dispatch.php
+++ b/htdocs/fourn/commande/dispatch.php
@@ -499,7 +499,7 @@ if ($id > 0 || ! empty($ref)) {
 		$sql .= " WHERE l.fk_commande = " . $object->id;
 		if (empty($conf->global->STOCK_SUPPORTS_SERVICES))
 			$sql .= " AND l.product_type = 0";
-		$sql .= " GROUP BY p.ref, p.label, p.tobatch, l.rowid, l.fk_product, l.subprice, l.remise_percent"; // Calculation of amount dispatched is done per fk_product so we must group by fk_product
+		$sql .= " GROUP BY p.ref, p.label, p.tobatch, l.rowid, l.fk_product, l.subprice, l.remise_percent, p.fk_default_warehouse"; // Calculation of amount dispatched is done per fk_product so we must group by fk_product
 		$sql .= " ORDER BY p.ref, p.label";
 
 		$resql = $db->query($sql);