diff --git a/app/controllers/issues_controller.rb b/app/controllers/issues_controller.rb
index c40de5d5d..d836c7f29 100644
--- a/app/controllers/issues_controller.rb
+++ b/app/controllers/issues_controller.rb
@@ -50,7 +50,6 @@ class IssuesController < ApplicationController
   include SortHelper
   include IssuesHelper
   helper :timelog
-  helper :gantt
   include Redmine::Export::PDF
 
   def index