diff --git a/erpnext/selling/doctype/sales_order/sales_order.py b/erpnext/selling/doctype/sales_order/sales_order.py
index 37d7ef1f162..34ab703d817 100755
--- a/erpnext/selling/doctype/sales_order/sales_order.py
+++ b/erpnext/selling/doctype/sales_order/sales_order.py
@@ -1612,12 +1612,14 @@ def make_purchase_order(
 
 	def set_missing_values(source, target):
 		target.supplier = supplier
-		target.currency = frappe.db.get_value(
-			"Supplier", filters={"name": supplier}, fieldname=["default_currency"]
-		)
 		company_currency = frappe.db.get_value(
 			"Company", filters={"name": target.company}, fieldname=["default_currency"]
 		)
+		supplier_currency = frappe.db.get_value(
+			"Supplier", filters={"name": supplier}, fieldname=["default_currency"]
+		)
+
+		target.currency = supplier_currency if supplier_currency else company_currency
 
 		target.conversion_rate = get_exchange_rate(target.currency, company_currency, args="for_buying")