diff --git a/erpnext/patches/v8_0/update_sales_cost_in_project.py b/erpnext/patches/v8_0/update_sales_cost_in_project.py
index cc3798e..8f3aa26 100644
--- a/erpnext/patches/v8_0/update_sales_cost_in_project.py
+++ b/erpnext/patches/v8_0/update_sales_cost_in_project.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2013, Web Notes Technologies Pvt. Ltd. and Contributors
+# Copyright (c) 2013, Frappé Technologies Pvt. Ltd. and Contributors
 # License: GNU General Public License v3. See license.txt
 
 from __future__ import unicode_literals
@@ -7,6 +7,6 @@
 def execute():
 	frappe.db.sql("""
 		update `tabProject` p
-		set total_sales_cost = (select sum(base_grand_total) 
-			from `tabSales Order` where project=p.name and docstatus=1)
-	""")
\ No newline at end of file
+		set total_sales_cost = ifnull((select sum(base_grand_total)
+			from `tabSales Order` where project=p.name and docstatus=1), 0)
+	""")