diff --git a/app/assets/javascripts/users_select.js.coffee b/app/assets/javascripts/users_select.js.coffee
index 12abf806bfa..9467011799f 100644
--- a/app/assets/javascripts/users_select.js.coffee
+++ b/app/assets/javascripts/users_select.js.coffee
@@ -117,5 +117,5 @@ class @UsersSelect
       callback(users)
 
   buildUrl: (url) ->
-    url = gon.relative_url_root + url if gon.relative_url_root?
+    url = gon.relative_url_root.replace(/\/$/, '') + url if gon.relative_url_root?
     return url