diff --git a/htdocs/langs/en_US/bills.lang b/htdocs/langs/en_US/bills.lang
index 5490d496221..0af0a26fd19 100644
--- a/htdocs/langs/en_US/bills.lang
+++ b/htdocs/langs/en_US/bills.lang
@@ -85,6 +85,7 @@ ClassifyPaid=Classify 'Paid'
 ClassifyPaidPartially=Classify 'Paid partially'
 ClassifyCanceled=Classify 'Abandoned'
 ClassifyClosed=Classify 'Closed'
+ClassifyUnBilled=Classify 'Unbilled'
 CreateBill=Create Invoice
 AddBill=Add invoice or credit note
 AddToDraftInvoices=Add to draft invoice