diff --git a/erpnext/stock/doctype/stock_entry/stock_entry.py b/erpnext/stock/doctype/stock_entry/stock_entry.py
index eae509e..fc686d1 100644
--- a/erpnext/stock/doctype/stock_entry/stock_entry.py
+++ b/erpnext/stock/doctype/stock_entry/stock_entry.py
@@ -35,11 +35,16 @@
 from erpnext.stock.utils import get_bin, get_incoming_rate
 
 
-class FinishedGoodError(frappe.ValidationError): pass
-class IncorrectValuationRateError(frappe.ValidationError): pass
-class DuplicateEntryForWorkOrderError(frappe.ValidationError): pass
-class OperationsNotCompleteError(frappe.ValidationError): pass
-class MaxSampleAlreadyRetainedError(frappe.ValidationError): pass
+class FinishedGoodError(frappe.ValidationError):
+	pass
+class IncorrectValuationRateError(frappe.ValidationError):
+	pass
+class DuplicateEntryForWorkOrderError(frappe.ValidationError):
+	pass
+class OperationsNotCompleteError(frappe.ValidationError):
+	pass
+class MaxSampleAlreadyRetainedError(frappe.ValidationError):
+	pass
 
 from erpnext.controllers.stock_controller import StockController