diff --git a/app/views/trackers/_form.html.erb b/app/views/trackers/_form.html.erb
index 107095540..7b5b7ea61 100644
--- a/app/views/trackers/_form.html.erb
+++ b/app/views/trackers/_form.html.erb
@@ -46,8 +46,9 @@
 <div class="splitcontentright">
 <% if @projects.any? %>
 <fieldset class="box" id="tracker_project_ids"><legend><%= l(:label_project_plural) %></legend>
+<% project_ids = @tracker.project_ids.to_a %>
 <%= render_project_nested_lists(@projects) do |p|
-  content_tag('label', check_box_tag('tracker[project_ids][]', p.id, @tracker.projects.to_a.include?(p), :id => nil) + ' ' + h(p))
+  content_tag('label', check_box_tag('tracker[project_ids][]', p.id, project_ids.include?(p.id), :id => nil) + ' ' + h(p))
 end %>
 <%= hidden_field_tag('tracker[project_ids][]', '', :id => nil) %>
 <p><%= check_all_links 'tracker_project_ids' %></p>