ipv6 with udpfromto on FreeBSD

Is this supposed to work? FreeBSD 10.0-RELEASE-p9 freeradius-server-2.2.5. I get this error when I try to turn it on: listen { type = "auth" ipv6addr = :: IPv6 address [::] port = 0 Failed initializing udpfromto: Invalid argument /usr/local/etc/raddb/radiusd.conf[32]: Error binding to port for :: port 1812