Binfmt_misc on 2.4 and 2.5

The errors below have been there for as long as I can remember, even under 2.4. The binfmt_misc folder in proc is empty on boot, even though I have the binfmt_misc module in the kernel (I think it didn't work builtin as well, but I haven't tested recently).

Jul 29 18:26:13 cobra wine: /etc/rc5.d/S98wine: line 16:

/proc/sys/fs/binfmt_misc/register: No such file or directory

Jul 29 18:26:13 cobra wine: /etc/rc5.d/S98wine: line 17:

/proc/sys/fs/binfmt_misc/register: No such file or directory

So what's wrong? Is this a kernel issue.. I thought it probably is. Or have I made a mistake somewhere...

Well, as I learned I need to mount binfmt_misc.
Note, however, that this is not documented anywhere
(not in the config help, nor in Documentation), and IMHO it definitely should be.