rad(8) question

[kolargol]

Hi,

I am playing with rad(8) in my LAN:

cat /etc/rad.conf
interface trunk0 {
  prefix fd94:eb64:36ae:44b9::/64
  default router yes
  dns {
    nameserver fd94:eb64:36ae:44b9::1
  }
}

and IP addresses are assigned as expected, but problem is that rad(8) send 
router address from link-local address-space (like fe80::aa3f:4f6c:ea26:6989 - 
trunk0 interface) of the router, whereas correct router IP address should be 
from prefix range.
How should I fix it ? Or what I am doing wrong ?

thanks,

kolargol