diff --git a/erpnext/selling/page/point_of_sale/pos_item_details.js b/erpnext/selling/page/point_of_sale/pos_item_details.js
index d899c5c..ec861d7 100644
--- a/erpnext/selling/page/point_of_sale/pos_item_details.js
+++ b/erpnext/selling/page/point_of_sale/pos_item_details.js
@@ -236,7 +236,7 @@
 				if (this.value) {
 					me.events.form_updated(me.current_item, 'warehouse', this.value).then(() => {
 						me.item_stock_map = me.events.get_item_stock_map();
-						const available_qty = me.item_stock_map[me.item_row.item_code][this.value];
+						const available_qty = me.item_stock_map[me.item_row.item_code] && me.item_stock_map[me.item_row.item_code][this.value];
 						if (available_qty === undefined) {
 							me.events.get_available_stock(me.item_row.item_code, this.value).then(() => {
 								// item stock map is updated now reset warehouse