diff --git a/erpnext/controllers/buying_controller.py b/erpnext/controllers/buying_controller.py
index 48b82bd..38beccd 100644
--- a/erpnext/controllers/buying_controller.py
+++ b/erpnext/controllers/buying_controller.py
@@ -459,6 +459,7 @@
 
 	def validate_items(self):
 		# validate items to see if they have is_purchase_item or is_subcontracted_item enabled
+		if self.doctype=="Material Request": return
 
 		if hasattr(self, "is_subcontracted") and self.is_subcontracted == 'Yes':
 			validate_item_type(self, "is_sub_contracted_item", "subcontracted")