Buildkernel failure for recent -current wrt dtrace

I am getting this for buildkernel,

linking kernel.debug
exception.o(.text+0xf2): In function `Xill':
/usr/src/sys/i386/i386/exception.s:176: undefined reference to
`dtrace_invop_jump_addr'
exception.o(.text+0x103):/usr/src/sys/i386/i386/exception.s:195: undefined
reference to `dtrace_invop_calltrap_addr'
exception.o(.text+0x10d):/usr/src/sys/i386/i386/exception.s:198: undefined
reference to `dtrace_invop_jump_addr'
*** Error code 1

Does anyone know what the cause is?

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."