diff --git a/app/views/shared/issuable/_milestone_dropdown.html.haml b/app/views/shared/issuable/_milestone_dropdown.html.haml
index 0434506c8d766ec602789a58ea9691bae255aa91..1c79494f816aa57081ddc579bc66836928ae2b7c 100644
--- a/app/views/shared/issuable/_milestone_dropdown.html.haml
+++ b/app/views/shared/issuable/_milestone_dropdown.html.haml
@@ -1,6 +1,6 @@
 - if params[:milestone_title]
   = hidden_field_tag(:milestone_title, params[:milestone_title])
-= dropdown_tag(h(params[:milestone_title].presence || "Milestone"), options: { title: "Filter by milestone", toggle_class: 'js-milestone-select js-filter-submit', filter: true, dropdown_class: "dropdown-menu-selectable",
+= dropdown_tag(h(params[:milestone_title].presence || "Milestone"), options: { title: "Filter by milestone", toggle_class: 'js-milestone-select js-filter-submit js-extra-options', filter: true, dropdown_class: "dropdown-menu-selectable",
   placeholder: "Search milestones", footer_content: @project.present?, data: { show_no: true, show_any: true, field_name: "milestone_title", selected: params[:milestone_title], project_id: @project.try(:id), milestones: milestones_filter_dropdown_path, default_label: "Milestone" } }) do
   - if @project
     %ul.dropdown-footer-list