diff --git a/erpnext/public/js/transaction.js b/erpnext/public/js/transaction.js
index 14d23d3..66cd501 100644
--- a/erpnext/public/js/transaction.js
+++ b/erpnext/public/js/transaction.js
@@ -503,7 +503,7 @@
 		var me = this;
 		var valid = true;
 		
-		$.each(["company", "customer", "supplier"], function(i, fieldname) {
+		$.each(["company", "customer"], function(i, fieldname) {
 			if(frappe.meta.has_field(me.frm.doc.doctype, fieldname)) {
 				if (!me.frm.doc[fieldname]) {
 					msgprint(frappe._("Please specify") + ": " + 
diff --git a/erpnext/stock/get_item_details.py b/erpnext/stock/get_item_details.py
index f211cae..5680da8 100644
--- a/erpnext/stock/get_item_details.py
+++ b/erpnext/stock/get_item_details.py
@@ -5,6 +5,7 @@
 import frappe
 from frappe import _, throw
 from frappe.utils import flt, cint, add_days
+from frappe.model.meta import has_field
 import json
 
 @frappe.whitelist()
@@ -32,9 +33,10 @@
 	if isinstance(args, basestring):
 		args = json.loads(args)
 	args = frappe._dict(args)
-	
+
 	if not args.get("transaction_type"):
-		args.transaction_type = "buying" if args.get("supplier") else "selling"
+		args.transaction_type = "buying" if has_field(args.get("doctype"), "supplier") \
+			else "selling"
 		
 	if not args.get("price_list"):
 		args.price_list = args.get("selling_price_list") or args.get("buying_price_list")