diff --git a/app/utils/url.js b/app/utils/url.js
index 019296a9f..7044191aa 100644
--- a/app/utils/url.js
+++ b/app/utils/url.js
@@ -1,15 +1,15 @@
 // Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
 // See License.txt for license information.
 
-export function isValidUrl(url) {
+export function isValidUrl(url = '') {
     const regex = /^https?:\/\//i;
     return regex.test(url);
 }
 
-export function stripTrailingSlashes(url) {
+export function stripTrailingSlashes(url = '') {
     return url.replace(/\/+$/, '').trim();
 }
 
-export function removeProtocol(url) {
+export function removeProtocol(url = '') {
     return url.replace(/(^\w+:|^)\/\//, '');
 }