diff --git a/erpnext/accounts/doctype/payment_entry/payment_entry.js b/erpnext/accounts/doctype/payment_entry/payment_entry.js
index 778729a..b7c97a7 100644
--- a/erpnext/accounts/doctype/payment_entry/payment_entry.js
+++ b/erpnext/accounts/doctype/payment_entry/payment_entry.js
@@ -148,8 +148,7 @@
 		var company_currency = frm.doc.company? frappe.get_doc(":Company", frm.doc.company).default_currency: "";
 
 		frm.toggle_display("source_exchange_rate",
-			(frm.doc.paid_amount 
-			 frm.doc.paid_from_account_currency != company_currency));
+			(frm.doc.paid_amount && frm.doc.paid_from_account_currency != company_currency));
 
 		frm.toggle_display("target_exchange_rate", (frm.doc.received_amount &&
 			frm.doc.paid_to_account_currency != company_currency &&