diff --git a/ui/scripts/ui/utils.js b/ui/scripts/ui/utils.js
index cda98a0c4f3..0287976d87b 100644
--- a/ui/scripts/ui/utils.js
+++ b/ui/scripts/ui/utils.js
@@ -61,6 +61,8 @@
    * Strip unwanted characters from user-based input
    */
   cloudStack.sanitize = window._s = function(str) {
+    if (!str) return '';
+    
     var sanitized = str
           .replace(/&/g, "&")
           .replace(/</g, "&lt;")