diff --git a/erpnext/public/js/controllers/transaction.js b/erpnext/public/js/controllers/transaction.js
index 1c0abdffcf..365851aab6 100644
--- a/erpnext/public/js/controllers/transaction.js
+++ b/erpnext/public/js/controllers/transaction.js
@@ -738,21 +738,15 @@ erpnext.TransactionController = erpnext.taxes_and_totals.extend({
 			}
 			else {
 				var valid_serial_nos = [];
-
+				var serialnos = [];
 				// Replacing all occurences of comma with carriage return
-				var serial_nos = item.serial_no.trim().replace(/,/g, '\n');
-
-				serial_nos = serial_nos.trim().split('\n');
-
-				// Trim each string and push unique string to new list
-				for (var x=0; x<=serial_nos.length - 1; x++) {
-					if (serial_nos[x].trim() != "" && valid_serial_nos.indexOf(serial_nos[x].trim()) == -1) {
-						valid_serial_nos.push(serial_nos[x].trim());
+				item.serial_no = item.serial_no.replace(/,/g, '\n');
+				serialnos = item.serial_no.split("\n");
+				for (var i = 0; i < serialnos.length; i++) {
+					if (serialnos[i] != "") {
+						valid_serial_nos.push(serialnos[i]);
 					}
 				}
-
-				// Add the new list to the serial no. field in grid with each in new line
-				item.serial_no = valid_serial_nos.join('\n');
 				item.conversion_factor = item.conversion_factor || 1;
 
 				refresh_field("serial_no", item.name, item.parentfield);