diff --git a/app/assets/javascripts/routes.ts b/app/assets/javascripts/routes.ts
index 42d646e37..66880fab8 100644
--- a/app/assets/javascripts/routes.ts
+++ b/app/assets/javascripts/routes.ts
@@ -3,7 +3,7 @@ import { isDesktopApplication } from './utils';
 /* @ngInject */
 export function configRoutes($locationProvider: ng.ILocationProvider) {
   if (!isDesktopApplication()) {
-    if (window.history && window.history.pushState) {
+    if (typeof window?.history?.pushState === 'function') {
       $locationProvider.html5Mode({
         enabled: true,
         requireBase: false