diff --git a/erpnext/projects/doctype/activity_type/activity_type.py b/erpnext/projects/doctype/activity_type/activity_type.py
index 7e316b5..cc43e82 100644
--- a/erpnext/projects/doctype/activity_type/activity_type.py
+++ b/erpnext/projects/doctype/activity_type/activity_type.py
@@ -3,14 +3,17 @@
 
 from __future__ import unicode_literals
 import frappe
-
+from frappe import _
 from frappe.model.document import Document
 
 class ActivityType(Document):
 	
 	def on_trash(self):
 		self.validate_manufacturing_type()
-		
+
+	def before_rename(self, olddn, newdn, merge=False):
+		self.validate_manufacturing_type()
+
 	def validate_manufacturing_type(self):
 		if self.activity_type == 'Manufacturing':
-			frappe.throw(_("Activity Type 'Manufacturing' cannot be deleted."))
\ No newline at end of file
+			frappe.throw(_("Activity Type 'Manufacturing' cannot be deleted/renamed."))
\ No newline at end of file