diff --git a/erpnext/projects/doctype/project/project.py b/erpnext/projects/doctype/project/project.py
index 66df901..fdd21ae 100644
--- a/erpnext/projects/doctype/project/project.py
+++ b/erpnext/projects/doctype/project/project.py
@@ -120,6 +120,11 @@
 		self.flags.dont_sync_tasks = True
 		self.save(ignore_permissions = True)
 
+	def after_insert(self):
+		if self.sales_order:
+			frappe.db.set_value("Sales Order", self.sales_order, "project", self.name)
+
+
 	def update_percent_complete(self):
 		total = frappe.db.sql("""select count(name) from tabTask where project=%s""", self.name)[0][0]
 		if not total and self.percent_complete: