diff --git a/erpnext/buying/doctype/purchase_order/purchase_order.py b/erpnext/buying/doctype/purchase_order/purchase_order.py
index 372e8d3..a021690 100644
--- a/erpnext/buying/doctype/purchase_order/purchase_order.py
+++ b/erpnext/buying/doctype/purchase_order/purchase_order.py
@@ -38,7 +38,7 @@
 		super(PurchaseOrder, self).onload()
 
 		self.set_onload('disable_fetch_last_purchase_rate',
-		cint(frappe.db.get_single_value("Buying Settings", "disable_fetch_last_purchase_rate")))
+			cint(frappe.db.get_single_value("Buying Settings", "disable_fetch_last_purchase_rate")))
 
 	def validate(self):
 		super(PurchaseOrder, self).validate()