diff --git a/config/routes.rb b/config/routes.rb
index f1fc593..db458be 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -82,7 +82,8 @@ ActionController::Routing::Routes.draw do |map|
 
   map.with_options :controller => 'gantts', :action => 'show' do |gantts_routes|
     gantts_routes.connect '/projects/:project_id/issues/gantt'
-    gantts_routes.connect '/issues/gantt'
+    gantts_routes.connect '/projects/:project_id/issues/gantt.:format'
+    gantts_routes.connect '/issues/gantt.:format'
   end
   
   map.with_options :controller => 'calendars', :action => 'show' do |calendars_routes|
diff --git a/test/integration/routing_test.rb b/test/integration/routing_test.rb
index cb01a89..705c562 100644
--- a/test/integration/routing_test.rb
+++ b/test/integration/routing_test.rb
@@ -94,7 +94,9 @@ class RoutingTest < ActionController::IntegrationTest
     should_route :get, "/projects/project-name/issues/calendar", :controller => 'calendars', :action => 'show', :project_id => 'project-name'
 
     should_route :get, "/issues/gantt", :controller => 'gantts', :action => 'show'
+    should_route :get, "/issues/gantt.pdf", :controller => 'gantts', :action => 'show', :format => 'pdf'
     should_route :get, "/projects/project-name/issues/gantt", :controller => 'gantts', :action => 'show', :project_id => 'project-name'
+    should_route :get, "/projects/project-name/issues/gantt.pdf", :controller => 'gantts', :action => 'show', :project_id => 'project-name', :format => 'pdf'
 
     should_route :get, "/issues/auto_complete", :controller => 'auto_completes', :action => 'issues'