diff --git a/erpnext/controllers/accounts_controller.py b/erpnext/controllers/accounts_controller.py
index f15d6c85638..92d380421d7 100644
--- a/erpnext/controllers/accounts_controller.py
+++ b/erpnext/controllers/accounts_controller.py
@@ -237,9 +237,9 @@ class AccountsController(TransactionBase):
 				document_type = "{} Item".format(self.doctype)
 				parent_dict.update({"document_type": document_type})
 
-				# party_name field used for customer in opportunity and quotation
-				if not parent_dict.get("customer") and parent_dict.get("party_name"):
-					parent_dict.update({"customer": parent_dict.get("party_name")})
+			# party_name field used for customer in quotation
+			if self.doctype == "Quotation" and self.quotation_to == "Customer" and parent_dict.get("party_name"):
+				parent_dict.update({"customer": parent_dict.get("party_name")})
 
 			for item in self.get("items"):
 				if item.get("item_code"):