dstumbler compilation on OpenBSD 3.1 failing

Good morning all,

I've just cvsuped the source, however when I try and compile it, it craps out.
Would any one be able to point me in the right direction. I'm running OpenBSD 3.1-stable.  Below is the error I'm getting.

$ ./configure

*** configuring dstumbler v1.0 ***
*** by h1kari - (c) 2001 Dachb0den Labs ***

checking for host os... openbsd
checking for curses... yes

openbsd system configured with the following compilation options:
  CFLAGS=-Wall -I/usr/local/include
  LDFLAGS=-lcurses

at this time you can make any last minute changes to the Makefile if 
needed. once you are satisfied, run make to compile dstumbler.

$ make
gcc -Wall -I/usr/local/include  -c main.c
main.c: In function `start_loop':
main.c:274: `WI_DEBUG_CHAN' undeclared (first use in this function)
main.c:274: (Each undeclared identifier is reported only once
main.c:274: for each function it appears in.)
*** Error code 1

Stop in /home/src/bsd-airtools/dstumbler.


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