diff --git a/htdocs/langs/en_US/stocks.lang b/htdocs/langs/en_US/stocks.lang
index 823cb5cc04f..1654d4bb197 100644
--- a/htdocs/langs/en_US/stocks.lang
+++ b/htdocs/langs/en_US/stocks.lang
@@ -33,6 +33,7 @@ StockCorrection=Correct stock
 StockMovement=Transfer
 StockMovements=Stock transfers
 NumberOfUnit=Number of units
+UnitPurchaseValue=Unit purchase price
 TotalStock=Total in stock
 StockTooLow=Stock too low
 EnhancedValue=Value
diff --git a/htdocs/langs/es_ES/stocks.lang b/htdocs/langs/es_ES/stocks.lang
index f9cbb5ededd..061d01ed587 100644
--- a/htdocs/langs/es_ES/stocks.lang
+++ b/htdocs/langs/es_ES/stocks.lang
@@ -33,6 +33,7 @@ StockCorrection=Corrección stock
 StockMovement=Transferencia
 StockMovements=Movimientos de stock
 NumberOfUnit=Número de piezas
+UnitPurchaseValue=Precio de compra unitario
 TotalStock=Total en stock
 StockTooLow=Stock insuficiente
 EnhancedValue=Valor