diff --git a/erpnext/public/js/controllers/taxes_and_totals.js b/erpnext/public/js/controllers/taxes_and_totals.js
index ebb7120..7481000 100644
--- a/erpnext/public/js/controllers/taxes_and_totals.js
+++ b/erpnext/public/js/controllers/taxes_and_totals.js
@@ -58,7 +58,7 @@
 
 		if (
 			in_list(["Sales Invoice", "POS Invoice"], this.frm.doc.doctype)
-			&& this.frm.doc.is_pos 
+			&& this.frm.doc.s_pos
 			&& this.frm.doc.is_return
 		) {
 			this.set_total_amount_to_default_mop();