dtrace and xorg-server problem on -current

Hi,
I get this weird building problem with xorg-server on -current with dtrace:

creating libxpstubs.la
(cd .libs && rm -f libxpstubs.la && ln -s ../libxpstubs.la libxpstubs.la)
/usr/sbin/dtrace -G -C -o dtrace-dix.o -s ../dix/Xserver.d .libs/*.o
dtrace: failed to compile script ../dix/Xserver.d:
"/usr/lib/dtrace/psinfo.d", line 37: syntax error near "uid_t"
*** Error code 1

Stop in /usr/ports/x11-servers/xorg-server/work/xorg-server-1.4/dix.
*** Error code 1

Stop in /usr/ports/x11-servers/xorg-server/work/xorg-server-1.4/dix.
*** Error code 1

Stop in /usr/ports/x11-servers/xorg-server/work/xorg-server-1.4.
*** Error code 1

Stop in /usr/ports/x11-servers/xorg-server.
*** Error code 1

Stop in /usr/ports/x11-servers/xorg-server.

===>>> make failed for x11-servers/xorg-server
===>>> Aborting update

===>>> Update for xorg-server-1.4_6,1 failed
===>>> Aborting update

===>>> Update for xf86-video-nv-2.1.7 failed
===>>> Aborting update


Something I've missed here?

Jiawei

-- 
"If it looks like a duck, walks like a duck, and quacks like a duck, then to
the end user it's a duck, and end users have made it pretty clear they want
a duck; whether the duck drinks hot chocolate or coffee is irrelevant."