diff --git a/app/views/projects/_form.html.erb b/app/views/projects/_form.html.erb
index 864bfb305..5bd5a9f0c 100644
--- a/app/views/projects/_form.html.erb
+++ b/app/views/projects/_form.html.erb
@@ -29,7 +29,7 @@
 </div>
 
 <% if @project.safe_attribute?('enabled_module_names') %>
-<fieldset class="box tabular"><legend><%= l(:label_module_plural) %></legend>
+<fieldset class="box tabular" id="project_modules"><legend><%= toggle_checkboxes_link('#project_modules input[type="checkbox"]') %><%= l(:label_module_plural) %></legend>
 <% Redmine::AccessControl.available_project_modules.each do |m| %>
     <label class="floating">
     <%= check_box_tag 'project[enabled_module_names][]', m, @project.module_enabled?(m), :id => "project_enabled_module_names_#{m}" %>