diff --git a/erpnext/accounts/report/item_wise_sales_register/item_wise_sales_register.py b/erpnext/accounts/report/item_wise_sales_register/item_wise_sales_register.py
index ac9f4ce..0032c80 100644
--- a/erpnext/accounts/report/item_wise_sales_register/item_wise_sales_register.py
+++ b/erpnext/accounts/report/item_wise_sales_register/item_wise_sales_register.py
@@ -188,7 +188,7 @@
 			%s
 		order by description
 	""" % (tax_doctype, '%s', ', '.join(['%s']*len(invoice_item_row)), conditions),
-		tuple([doctype] + invoice_item_row.keys()))
+		tuple([doctype] + list(invoice_item_row)))
 
 	for parent, description, item_wise_tax_detail, charge_type, tax_amount in tax_details:
 		description = handle_html(description)