diff --git a/lib/redmine/helpers/gantt.rb b/lib/redmine/helpers/gantt.rb
index 4ea779d16..9fc9f54eb 100644
--- a/lib/redmine/helpers/gantt.rb
+++ b/lib/redmine/helpers/gantt.rb
@@ -150,7 +150,6 @@ module Redmine
       # Returns issues that will be rendered
       def issues
         @issues ||= @query.issues(
-          :include => [:assigned_to, :tracker, :priority, :category, :fixed_version],
           :order => ["#{Project.table_name}.lft ASC", "#{Issue.table_name}.id ASC"],
           :limit => @max_rows
         )