logrotate reports error re: mirobridge.log

Every day, anacron emails me with:

/etc/cron.daily/logrotate:
error: stat of /var/log/mythtv/mirobridge.log failed: No such file or directory

My guess is this is because I am not using mirobridge, so there's no log file, but /etc/logrotate.d/mythtv-backend is still configured with an entry for mirobridge.log

I originally installed Ubuntu Lucid Lynx, and then I added the Mythbuntu package repositories to get the latest fixes.

I am using mythtv-backend 0.23.0+fixes24669-0ubuntu0+mythbuntu2.

I can work around this by editing the configuration file (or maybe creating a dummy log file?) but obviously it would be better if this weren't necessary. Thanks.