diff --git a/app/controllers/calendar_controller.rb b/app/controllers/calendar_controller.rb
index b7aa0ff0..704ca8d5 100644
--- a/app/controllers/calendar_controller.rb
+++ b/app/controllers/calendar_controller.rb
@@ -17,7 +17,7 @@ class CalendarController < ApplicationController
         cookies[:mobile_url]= {:value => request.fullpath, :secure => SITE_CONFIG['secure_cookies']}
       }
       format.ics   {
-        render :action => 'show', :layout => false, :content_type => Mime::ICS
+        render :action => 'show', :layout => false, :content_type => Mime[:ics]
       }
       format.xml {
         render :xml => @due_all.to_xml( *todo_xml_params )
diff --git a/app/controllers/contexts_controller.rb b/app/controllers/contexts_controller.rb
index a6602e8a..b6e4f6b9 100644
--- a/app/controllers/contexts_controller.rb
+++ b/app/controllers/contexts_controller.rb
@@ -26,9 +26,9 @@ class ContextsController < ApplicationController
         @feed_description = "Lists all the contexts for #{current_user.display_name}"
       end
       format.text do
-        # somehow passing Mime::TEXT using content_type to render does not work
-        headers['Content-Type']=Mime::TEXT.to_s
-        render :action => 'index', :layout => false, :content_type => Mime::TEXT
+        # somehow passing Mime[:text] using content_type to render does not work
+        headers['Content-Type']=Mime[:text].to_s
+        render :action => 'index', :layout => false, :content_type => Mime[:text]
       end
       format.autocomplete &render_autocomplete
     end
diff --git a/app/controllers/projects_controller.rb b/app/controllers/projects_controller.rb
index dc33ea3b..c0ced86c 100644
--- a/app/controllers/projects_controller.rb
+++ b/app/controllers/projects_controller.rb
@@ -43,8 +43,8 @@ class ProjectsController < ApplicationController
           @feed_description = I18n.t('models.project.feed_description', :username => current_user.display_name)
         end
         format.text do
-          # somehow passing Mime::TEXT using content_type to render does not work
-          headers['Content-Type']=Mime::TEXT.to_s
+          # somehow passing Mime[:text] using content_type to render does not work
+          headers['Content-Type']=Mime[:text].to_s
         end
         format.autocomplete do
           projects = current_user.projects.active + current_user.projects.hidden
@@ -114,9 +114,9 @@ class ProjectsController < ApplicationController
     @projects = current_user.projects.active
     respond_to do |format|
       format.text  {
-        # somehow passing Mime::TEXT using content_type to render does not work
-        headers['Content-Type']=Mime::TEXT.to_s
-        render :action => 'index_text_projects_and_actions', :layout => false, :content_type => Mime::TEXT
+        # somehow passing Mime[:text] using content_type to render does not work
+        headers['Content-Type']=Mime[:text].to_s
+        render :action => 'index_text_projects_and_actions', :layout => false, :content_type => Mime[:text]
       }
     end
   end
diff --git a/app/controllers/todos_controller.rb b/app/controllers/todos_controller.rb
index 0a079bfe..21f4da8c 100644
--- a/app/controllers/todos_controller.rb
+++ b/app/controllers/todos_controller.rb
@@ -43,9 +43,9 @@ class TodosController < ApplicationController
         render :action => 'index'.freeze
       end
       format.text  do
-        # somehow passing Mime::TEXT using content_type to render does not work
-        headers['Content-Type'.freeze]=Mime::TEXT.to_s
-        render :content_type => Mime::TEXT
+        # somehow passing Mime[:text] using content_type to render does not work
+        headers['Content-Type'.freeze]=Mime[:text].to_s
+        render :content_type => Mime[:text]
       end
       format.xml do
         @xml_todos = params[:limit_to_active_todos] ? @not_done_todos : @todos
@@ -670,7 +670,7 @@ class TodosController < ApplicationController
         cookies[:mobile_url]= {:value => request.fullpath, :secure => SITE_CONFIG['secure_cookies']}
       }
       format.text {
-        render :action => 'index', :layout => false, :content_type => Mime::TEXT
+        render :action => 'index', :layout => false, :content_type => Mime[:text]
       }
     end
   end