diff --git a/erpnext/buying/doctype/purchase_order/purchase_order.py b/erpnext/buying/doctype/purchase_order/purchase_order.py
index b96245e..b3bbb92 100644
--- a/erpnext/buying/doctype/purchase_order/purchase_order.py
+++ b/erpnext/buying/doctype/purchase_order/purchase_order.py
@@ -311,6 +311,9 @@
 	doc = get_mapped_doc("Purchase Order", source_name,	{
 		"Purchase Order": {
 			"doctype": "Purchase Invoice",
+			"field_map": {
+				"party_account_currency": "party_account_currency"
+			},
 			"validation": {
 				"docstatus": ["=", 1],
 			}