diff --git a/erpnext/manufacturing/doctype/blanket_order/blanket_order.js b/erpnext/manufacturing/doctype/blanket_order/blanket_order.js
index 0bbf689..1e18678 100644
--- a/erpnext/manufacturing/doctype/blanket_order/blanket_order.js
+++ b/erpnext/manufacturing/doctype/blanket_order/blanket_order.js
@@ -51,11 +51,13 @@
 
 	set_tc_name_filter: function(frm) {
 		if (frm.doc.blanket_order_type === 'Selling') {
+			frm.set_df_property("customer","reqd", 1)
 			frm.set_query("tc_name", function() {
 				return { filters: { selling: 1 } };
 			});
 		}
 		if (frm.doc.blanket_order_type === 'Purchasing') {
+			frm.set_df_property("customer","reqd", 1)			
 			frm.set_query("tc_name", function() {
 				return { filters: { buying: 1 } };
 			});