diff --git a/selling/doctype/sales_order/sales_order.py b/selling/doctype/sales_order/sales_order.py
index 9d23565..f024efc 100644
--- a/selling/doctype/sales_order/sales_order.py
+++ b/selling/doctype/sales_order/sales_order.py
@@ -59,7 +59,7 @@
 	#-------------------------
 	def pull_project_customer(self):
 		res = sql("select customer from `tabProject` where name = '%s'"%self.doc.project_name)
-		if res:
+		if res and res[0][0]:
 			get_obj('DocType Mapper', 'Project-Sales Order').dt_map('Project', 'Sales Order', self.doc.project_name, self.doc, self.doclist, "[['Project', 'Sales Order']]")