diff --git a/erpnext/stock/doctype/delivery_note/delivery_note.py b/erpnext/stock/doctype/delivery_note/delivery_note.py
index 7cb855fd67..0dabfa13e1 100644
--- a/erpnext/stock/doctype/delivery_note/delivery_note.py
+++ b/erpnext/stock/doctype/delivery_note/delivery_note.py
@@ -124,8 +124,8 @@ class DeliveryNote(SellingController):
 				})
 
 		if cint(frappe.db.get_single_value('Selling Settings', 'maintain_same_sales_rate')) and not self.is_return:
-			self.validate_rate_with_reference_doc([["Sales Order", "sales_order", "so_detail"],
-				["Sales Invoice", "sales_invoice", "si_detail"]])
+			self.validate_rate_with_reference_doc([["Sales Order", "against_sales_order", "so_detail"],
+				["Sales Invoice", "against_sales_invoice", "si_detail"]])
 
 	def validate_proj_cust(self):
 		"""check for does customer belong to same project as entered.."""