diff --git a/erpnext/accounts/doctype/pos_invoice/pos_invoice.py b/erpnext/accounts/doctype/pos_invoice/pos_invoice.py
index a5e4d9a6dd..9eded8a777 100644
--- a/erpnext/accounts/doctype/pos_invoice/pos_invoice.py
+++ b/erpnext/accounts/doctype/pos_invoice/pos_invoice.py
@@ -743,4 +743,4 @@ def add_return_modes(doc, pos_profile):
 
 
 def on_doctype_update():
-	frappe.db.add_index("POS Invoice", ["customer", "is_return", "return_against"])
+	frappe.db.add_index("POS Invoice", ["return_against"])