diff -r cf4b80992451 -r cb0f9b4646aa app/soc/modules/ghop/tasks/task_update.py
--- a/app/soc/modules/ghop/tasks/task_update.py	Mon Sep 07 20:27:37 2009 +0200
+++ b/app/soc/modules/ghop/tasks/task_update.py	Mon Sep 07 20:36:14 2009 +0200
@@ -23,7 +23,6 @@
 
 
 import logging
-import os
 
 from google.appengine.api.labs import taskqueue
 from google.appengine.ext import db
@@ -31,6 +30,7 @@
 from django import http
 from django.utils.translation import ugettext
 
+from soc.logic import system
 from soc.tasks.helper import error_handler
 from soc.views.helper import redirects
 
@@ -180,7 +180,7 @@
       subscriber_start_index:subscriber_start_index+batch_size])
 
   task_url = "http://%(host)s%(task)s" % {
-                 'host': os.environ['HTTP_HOST'],
+                 'host': system.getHostname(),
                  'task': redirects.getPublicRedirect(
                      task_entity, {'url_name': 'ghop/task'}),
                  }