Change feed URL?

I had some server troubles earlier this week, and so I had to un-install and re-install wordpress at my site. Everything is working great now, except that upon reinstallation, my feed URL has changed. That means that I’m posting, but 98% of my readers don’t know it.

The feed that everyone subscribes to is:

http://www.twas-brillig.com/feed/

The one that it’s now using is:

http://www.twas-brillig.com/?feed=rss2

Is there any way to change it back to the old one? Thanks!