diff --git a/erpnext/projects/doctype/project/project.py b/erpnext/projects/doctype/project/project.py
index bbf5fec3453..ba0932e79e3 100644
--- a/erpnext/projects/doctype/project/project.py
+++ b/erpnext/projects/doctype/project/project.py
@@ -200,7 +200,11 @@ class Project(Document):
 			frappe.db.set_value("Sales Order", self.sales_order, "project", self.name)
 
 	def update_percent_complete(self, from_validate=False):
-		if not self.tasks: return
+		if not self.tasks:
+			if self.status == "Completed" :
+				self.percent_complete = 100
+			return
+			
 		total = frappe.db.sql("""select count(name) from tabTask where project=%s""", self.name)[0][0]
 		if not total and self.percent_complete:
 			self.percent_complete = 0