diff --git a/app/controllers/admin/galleries_controller.rb b/app/controllers/admin/galleries_controller.rb
index 5d59505..145e7fe 100644
--- a/app/controllers/admin/galleries_controller.rb
+++ b/app/controllers/admin/galleries_controller.rb
@@ -7,6 +7,7 @@ class Admin::GalleriesController < OrbitAdminController
   layout :compute_layout
   find_tag = Tag.all.select{|value| value.name==I18n.t('gallery.not_show_desc')}
   RackTempMiddleExist = defined?(Rack::TempfileReaper)
+  RACK_TEMPFILES = defined?(Rack::RACK_TEMPFILES) ? Rack::RACK_TEMPFILES : 'rack.tempfiles'
   if find_tag.length==0
     module_app_id = ModuleApp.where(:key=>"gallery").first[:_id]
     tags = ModuleApp.where(:key=>"gallery").first.tags
@@ -559,7 +560,7 @@ class Admin::GalleriesController < OrbitAdminController
         album_unprocess.save_var = file
         album_unprocess.save!
         ObjectSpace.undefine_finalizer(file.tempfile)
-        request.set_header(Rack::RACK_TEMPFILES, []) if RackTempMiddleExist # Avoid Rack::TempfileReaper Middleware to unlink temp files automatically.
+        request.set_header(RACK_TEMPFILES, []) if RackTempMiddleExist # Avoid Rack::TempfileReaper Middleware to unlink temp files automatically.
       end
       image.save!
     end