diff --git a/tryton/modules/account_invoice/locale/es.po b/tryton/modules/account_invoice/locale/es.po
index 6c82077b5b..b44cbabedc 100644
--- a/tryton/modules/account_invoice/locale/es.po
+++ b/tryton/modules/account_invoice/locale/es.po
@@ -950,7 +950,7 @@ msgstr ""

 msgctxt "model:ir.message,text:msg_invoice_similar"
 msgid "The invoice \"%(invoice)s\" is similar to invoice \"%(similar)s\"."
-msgstr "La factura \"%(invoices)s\" es similar a la factura \"%(similar)s\"."
+msgstr "La factura \"%(invoice)s\" es similar a la factura \"%(similar)s\"."

 msgctxt "model:ir.message,text:msg_invoice_tax_create"
 msgid ""