diff --git a/erpnext/selling/doctype/sales_order/sales_order.py b/erpnext/selling/doctype/sales_order/sales_order.py
index 9a3c260..e5a8a71 100755
--- a/erpnext/selling/doctype/sales_order/sales_order.py
+++ b/erpnext/selling/doctype/sales_order/sales_order.py
@@ -830,7 +830,7 @@
 		frappe.throw(_("Please set a Supplier against the Items to be considered in the Purchase Order."))
 
 	for supplier in suppliers:
-    	doc = get_mapped_doc("Sales Order", source_name, {
+		doc = get_mapped_doc("Sales Order", source_name, {
 			"Sales Order": {
 				"doctype": "Purchase Order",
 				"field_no_map": [