diff --git a/erp/sale/sale.go b/erp/sale/sale.go
index f7fb925..dc76826 100644
--- a/erp/sale/sale.go
+++ b/erp/sale/sale.go
@@ -6,4 +6,5 @@ type Sale struct {
 	Audit   audit
 	Benefit benefit
 	Append  append
+	Change  change
 }