diff --git a/erpnext/controllers/accounts_controller.py b/erpnext/controllers/accounts_controller.py
index e47e9917149f..b14cf428c53c 100644
--- a/erpnext/controllers/accounts_controller.py
+++ b/erpnext/controllers/accounts_controller.py
@@ -1096,9 +1096,11 @@ def get_voucher_subtype(self):
 			return "Purchase Return"
 		elif self.doctype == "Delivery Note" and self.is_return:
 			return "Sales Return"
-		elif (self.doctype == "Sales Invoice" and self.is_return) or self.doctype == "Purchase Invoice":
+		elif self.doctype == "Sales Invoice" and self.is_return:
 			return "Credit Note"
-		elif (self.doctype == "Purchase Invoice" and self.is_return) or self.doctype == "Sales Invoice":
+		elif self.doctype == "Sales Invoice" and self.is_debit_note:
+			return "Debit Note"
+		elif self.doctype == "Purchase Invoice" and self.is_return:
 			return "Debit Note"
 
 		return self.doctype