diff --git a/htdocs/product/inventory/class/inventory.class.php b/htdocs/product/inventory/class/inventory.class.php
index 29c1ffb902421..560cb3e1b7de5 100644
--- a/htdocs/product/inventory/class/inventory.class.php
+++ b/htdocs/product/inventory/class/inventory.class.php
@@ -297,7 +297,9 @@ public function validate(User $user, $notrigger = false, $include_sub_warehouse
 				if (!empty($include_sub_warehouse) && getDolGlobalInt('INVENTORY_INCLUDE_SUB_WAREHOUSE')) {
 					$TChildWarehouses = array();
 					$this->getChildWarehouse($this->fk_warehouse, $TChildWarehouses);
-					$sql .= " OR ps.fk_entrepot IN (".$this->db->sanitize(join(',', $TChildWarehouses)).")";
+					if (!empty($TChildWarehouses)) {
+						$sql .= " OR ps.fk_entrepot IN (".$this->db->sanitize(join(',', $TChildWarehouses)).")";
+					}
 				}
 				$sql .= ')';
 			}