diff --git a/app/views/issues/_form.html.erb b/app/views/issues/_form.html.erb
index 73671d85..6f9c44a4 100644
--- a/app/views/issues/_form.html.erb
+++ b/app/views/issues/_form.html.erb
@@ -19,6 +19,9 @@
 
 <% if @issue.safe_attribute? 'subject' %>
 <p><%= f.text_field :subject, :size => 80, :maxlength => 255, :required => true, :style => "font-size:small" %></p>
+<!--Added by young-->
+<%= javascript_tag "observeAutocompleteField('issue_subject', '#{escape_javascript auto_complete_issues_path(:project_id => @project, :scope => (Setting.cross_project_issue_relations? ? 'all' : nil))}')" %>
+<!--End by young-->
 <% end %>
 
 <% if @issue.safe_attribute? 'description' %>