puc driver -- config problem?

[David Brodbeck]

I'm sure this is something really simple I'm missing, but after an hour of 
tinkering and doing Google searches I'm at a loss.

I'm running FreeBSD 4.8-RELEASE on an Alpha.  I just installed an NM9835 
2-port PCI serial card.  I added 'device puc' to my kernel configuration 
file, as suggested in 'man puc', but when I run config I get this error:

Warning: device "puc" is unknown

What am I doing wrong?