diff --git a/erpnext/public/js/controllers/transaction.js b/erpnext/public/js/controllers/transaction.js
index 7739110..f43e3e7 100644
--- a/erpnext/public/js/controllers/transaction.js
+++ b/erpnext/public/js/controllers/transaction.js
@@ -17,7 +17,7 @@
 
 			frappe.model.round_floats_in(item, ["rate", "price_list_rate"]);
 
-			if(item.price_list_rate) {
+			if(item.price_list_rate && !item.blanket_order_rate) {
 				if(item.rate > item.price_list_rate && has_margin_field) {
 					// if rate is greater than price_list_rate, set margin
 					// or set discount