diff --git a/htdocs/langs/en_US/bills.lang b/htdocs/langs/en_US/bills.lang
index 57681119360..c9e93b1cc29 100644
--- a/htdocs/langs/en_US/bills.lang
+++ b/htdocs/langs/en_US/bills.lang
@@ -17,7 +17,7 @@ DisabledBecauseNotLastSituationInvoice=Disabled because invoice is not erasable.
 DisabledBecauseThereIsAPayment=Disabled because invoice has already some payments.
 DisabledBecauseAlreadyPrintedOnce=Disabled because invoice has already been downloaded or printed at least once
 DisabledBecauseAlreadySentByEmail=Disabled because invoice has already been sent by email at least once
-DisabledBecauseVersionProtected=Disabled because invoice has already been validated and you are using version secured against deletion of invoices
+DisabledBecauseVersionProtected=Disabled because invoice has already been validated and you are using a version secured against deletion of invoices
 DisabledBecauseNotDraft=Disabled because invoice is not in draft status
 DisabledBecauseNotErasable=Disabled because cannot be erased (unknown reason)
 InvoiceStandard=Standard invoice