Device random seems broken.

I have 

device          random          # Entropy device
options         RANDOM_YARROW

in my kernel config file.  When rebuilding world, I'm
seeing 

In file included from /usr/src/sys/modules/random_fortuna/../../dev/random/randomdev.c:44:
/usr/src/sys/sys/random.h:39:2: error: "Cannot define both RANDOM_LOADABLE and
      RANDOM_YARROW"
#error "Cannot define both RANDOM_LOADABLE and RANDOM_YARROW"
 ^
1 error generated.
In file included from /usr/src/sys/modules/random_fortuna/../../dev/random/fortuna.c:45:
/usr/src/sys/sys/random.h:39:2: error: "Cannot define both RANDOM_LOADABLE and
      RANDOM_YARROW"
#error "Cannot define both RANDOM_LOADABLE and RANDOM_YARROW"
 ^
1 error generated.
mkdep: compile failed
*** Error code 1

Stop.
make[4]: stopped in /usr/src/sys/modules/random_fortuna
*** Error code 1

Please fix.

-- 
Steve