distribute /32 route via ospf?

hi: I need to add some hosts to ospf topology. if i setup eth0 as 192.168.1.254/32 and add eth0 to ospf interface, it won't be distributed. however 192.168.1.254/31 works fine. I don't know if there are options I can use so bird would like to distribute /32 route? thanks for help!! Regards, tbskyd