diff --git a/ui/app/services/watch-list.js b/ui/app/services/watch-list.js
index 51154d6bd..4387c40c4 100644
--- a/ui/app/services/watch-list.js
+++ b/ui/app/services/watch-list.js
@@ -18,6 +18,6 @@ export default Service.extend({
   },
 
   setIndexFor(url, value) {
-    list[url] = value;
+    list[url] = +value;
   },
 });