diff --git a/controllers/invoices.js b/controllers/invoices.js
index 8d0f2b8b..3ca1425b 100644
--- a/controllers/invoices.js
+++ b/controllers/invoices.js
@@ -14,7 +14,7 @@ exports.listInvoices = (req, res, next) => {
         error: (undefined === body || search_idx > -1) ? 'Error From Server!' : body.error
       });
     } else {
-      if (undefine !== body.invoices) {
+      if (undefined !== body.invoices) {
           body.invoices.forEach(invoice => {
             invoice.creation_date_str =  (undefined === invoice.creation_date) ? '' : common.convertTimestampToDate(invoice.creation_date);
             invoice.settle_date_str =  (undefined === invoice.settle_date) ? '' : common.convertTimestampToDate(invoice.settle_date);