diff --git a/erpnext/projects/doctype/timesheet/timesheet.py b/erpnext/projects/doctype/timesheet/timesheet.py
index d482a46053c..11156f4b506 100644
--- a/erpnext/projects/doctype/timesheet/timesheet.py
+++ b/erpnext/projects/doctype/timesheet/timesheet.py
@@ -374,6 +374,7 @@ def make_sales_invoice(source_name, item_code=None, customer=None, currency=None
 	billing_rate = billing_amount / hours
 
 	target.company = timesheet.company
+	target.project = timesheet.parent_project
 	if customer:
 		target.customer = customer