diff --git a/assets/javascripts/reporting/filters.js b/assets/javascripts/reporting/filters.js
index 61ff5de400..1fa8cc2c08 100644
--- a/assets/javascripts/reporting/filters.js
+++ b/assets/javascripts/reporting/filters.js
@@ -8,6 +8,7 @@ Reporting.Filters = {
     if (select === null || select === undefined) {
       return;
     }
+    url = select.readAttribute("remote-url");
     json_post_select_values = select.readAttribute('data-initially-selected')
     if (json_post_select_values !== null && json_post_select_values !== undefined) {
       post_select_values = json_post_select_values.replace(/'/g, '"').evalJSON(true);
@@ -17,7 +18,7 @@ Reporting.Filters = {
         window.global_prefix = "";
       }
 
-      new Ajax.Updater({ success: select.id }, window.global_prefix + '/reporting/available_values', {
+      new Ajax.Updater({ success: select.id }, url, {
         parameters: {
           filter_name: filter_name,
           values: json_post_select_values
diff --git a/lib/widget/filters/multi_values.rb b/lib/widget/filters/multi_values.rb
index 0cf9389e13..194c5dd37c 100644
--- a/lib/widget/filters/multi_values.rb
+++ b/lib/widget/filters/multi_values.rb
@@ -4,7 +4,8 @@ class Widget::Filters::MultiValues < Widget::Filters::Base
   def render
     write(content_tag :td do
       content_tag :div, :id => "#{filter_class.underscore_name}_arg_1", :class => "filter_values" do
-        select_options = {  :style => "vertical-align: top;", # FIXME: Do CSS
+        select_options = {  :"remote-url" => url_for(:controller => "cost_reports", :action => "available_values"),
+                            :style => "vertical-align: top;", # FIXME: Do CSS
                             :name => "values[#{filter_class.underscore_name}][]",
                             :"data-loading" => @options[:lazy] ? "ajax" : "",
                             :id => "#{filter_class.underscore_name}_arg_1_val",