diff --git a/erpnext/public/js/controllers/taxes_and_totals.js b/erpnext/public/js/controllers/taxes_and_totals.js
index e13927f..c653640 100644
--- a/erpnext/public/js/controllers/taxes_and_totals.js
+++ b/erpnext/public/js/controllers/taxes_and_totals.js
@@ -270,7 +270,7 @@
 					me.round_off_totals(tax);
 
 					// in tax.total, accumulate grand total for each item
-					tax.total = me.set_cumulative_total(i, tax);
+					me.set_cumulative_total(i, tax);
 
 					me.set_in_company_currency(tax,
 						["total", "tax_amount", "tax_amount_after_discount_amount"]);