Debug.log is preventing tor startup

I have mucked around with the debug log in /var/log/tor and now I get the following error;
[warn] Couldn’t open file for ‘Log debug file var/log/tor/debug.log’: No such file or directory.
I have chown the file to debian-tor user. I could use some idea of how to fix this problem.

Maybe you forgot the leading slash in var/log/tor/debug.log (should be /var/log/tor/debug.log)?