Update payment_entry.js
diff --git a/erpnext/accounts/doctype/payment_entry/payment_entry.js b/erpnext/accounts/doctype/payment_entry/payment_entry.js
index 4cd86c6..1bbe200 100644
--- a/erpnext/accounts/doctype/payment_entry/payment_entry.js
+++ b/erpnext/accounts/doctype/payment_entry/payment_entry.js
@@ -136,7 +136,7 @@
 
 		frm.set_currency_labels(["total_allocated_amount", "unallocated_amount"], party_account_currency);
 
-		currency_field = (frm.doc.payment_type=="Receive") ? "paid_from_account_currency" : "paid_to_account_currency"
+		var currency_field = (frm.doc.payment_type=="Receive") ? "paid_from_account_currency" : "paid_to_account_currency"
 		frm.set_df_property("total_allocated_amount", "options", currency_field);
 		frm.set_df_property("unallocated_amount", "options", currency_field);
 
@@ -750,4 +750,4 @@
 	deductions_remove: function(frm) {
 		frm.events.set_difference_amount(frm);
 	}
-})
\ No newline at end of file
+})