diff --git a/erpnext/public/js/controllers/transaction.js b/erpnext/public/js/controllers/transaction.js
index d6f2863ba03..3defa193fbf 100644
--- a/erpnext/public/js/controllers/transaction.js
+++ b/erpnext/public/js/controllers/transaction.js
@@ -76,7 +76,8 @@ erpnext.TransactionController = erpnext.taxes_and_totals.extend({
 
 			if(frm.doc.additional_discount_percentage && frm.doc.discount_amount) {
 				// Reset discount amount and net / grand total
-				frm.set_value("discount_amount", 0);
+				frm.doc.discount_amount = 0;
+				frm.cscript.calculate_taxes_and_totals();
 			}
 
 			var total = flt(frm.doc[frappe.model.scrub(frm.doc.apply_discount_on)]);