diff --git a/app/frontend/src/javascript/filters/filters.js b/app/frontend/src/javascript/filters/filters.js
index 4afe550c4..d384cacf4 100644
--- a/app/frontend/src/javascript/filters/filters.js
+++ b/app/frontend/src/javascript/filters/filters.js
@@ -370,6 +370,7 @@ Application.Filters.filter('currency', [function ($locale) {
 
 Application.Filters.filter('encodeURI', [function () {
   return function (str) {
+    if (!str) return '';
     return str.replace(/[!'()*]/g, function (c) {
       return '%' + c.charCodeAt(0).toString(16);
     });