I'm trying to set up a hidden service on tor, and I've copied the following into my torrc:

HiddenServiceDir /some/directory
HiddenServicePort 8333 127.0.0.1:8333

but now I'd like to make bitcoin bind only to 127.0.0.1:8333 whereas "netstat -lp" shows that it is listening on all interfaces. I haven't easily found how to specify this.

suggestions?