diff --git a/erpnext/selling/doctype/sales_order/sales_order.py b/erpnext/selling/doctype/sales_order/sales_order.py
index af78ab2..c4c3c0f 100755
--- a/erpnext/selling/doctype/sales_order/sales_order.py
+++ b/erpnext/selling/doctype/sales_order/sales_order.py
@@ -205,7 +205,7 @@
 		if self.coupon_code:
 			from erpnext.accounts.doctype.pricing_rule.utils import update_coupon_code_count
 			update_coupon_code_count(self.coupon_code,'cancelled')
-			
+
 	def update_project(self):
 		if frappe.db.get_single_value('Selling Settings', 'sales_update_frequency') != "Each Transaction":
 			return
@@ -661,12 +661,15 @@
 
 		if source_parent.project:
 			target.cost_center = frappe.db.get_value("Project", source_parent.project, "cost_center")
-		if not target.cost_center and target.item_code:
+		if target.item_code:
 			item = get_item_defaults(target.item_code, source_parent.company)
 			item_group = get_item_group_defaults(target.item_code, source_parent.company)
-			target.cost_center = item.get("selling_cost_center") \
+			cost_center = item.get("selling_cost_center") \
 				or item_group.get("selling_cost_center")
 
+			if cost_center:
+				target.cost_center = cost_center
+
 	doclist = get_mapped_doc("Sales Order", source_name, {
 		"Sales Order": {
 			"doctype": "Sales Invoice",