diff --git a/README b/README
index 732de07e4aa995151b45fba2b59e4a077efd4a93..caa4aa4a9f655c7487ac2ffa24e77ea2a95e4f77 100644
--- a/README
+++ b/README
@@ -21,8 +21,10 @@ If you want to mirror the I2P website, thanks! Here is a checklist:
 - Do not edit any of the files in i2p2www/ 
   - In particular, do not change the CANONICAL_DOMAIN variable in
     i2p2www/__init__.py, it needs to point to the official site for SEO.
-- The only variable you may need to edit is MTNURL in etc/update.vars
-  (if your Monotone server tunnel is listening on a different port).
+- If you need to edit variables in etc/update.vars, copy the file to
+  etc/update.vars.custom and edit appropriately. The only variable you
+  may need to edit is MTNURL in etc/update.vars (if your Monotone client
+  tunnel is listening on a different port).
 - If you want to enable caching, copy i2p2www/settings.py.sample to
   i2p2www/settings.py and edit appropriately.
 - Add ./site-updater.sh to your crontab. This will keep the site updated,