diff --git a/htdocs/langs/en_US/stocks.lang b/htdocs/langs/en_US/stocks.lang
index e6b9f82730c..16d46f0af98 100644
--- a/htdocs/langs/en_US/stocks.lang
+++ b/htdocs/langs/en_US/stocks.lang
@@ -59,6 +59,7 @@ RuleForStockManagementIncrease=Rule for automatic stock management increase (man
 DeStockOnBill=Decrease real stocks on customers invoices/credit notes validation
 DeStockOnValidateOrder=Decrease real stocks on customers orders validation
 DeStockOnShipment=Decrease real stocks on shipping validation
+DeStockOnShipmentClassifyBilled=Decrease real stocks on shipping classification billed
 ReStockOnBill=Increase real stocks on suppliers invoices/credit notes validation
 ReStockOnValidateOrder=Increase real stocks on suppliers orders approbation
 ReStockOnDispatchOrder=Increase real stocks on manual dispatching into warehouses, after supplier order receiving