asterisk users - Feb 2008 - chan_h323 build failure - `IPTOS_MINCOST' undeclared

Hi All,

I am trying to build chan_h323 for use with asterisk 1.4.18 on Solaris 
10. When I compile asterisk, the build fails at chan_h323 with:

----------------------------------------------------------------------
chan_h323.c: In function `reload_config':
chan_h323.c:2863: error: `IPTOS_MINCOST' undeclared (first use in this 
function)
chan_h323.c:2863: error: (Each undeclared identifier is reported only once
chan_h323.c:2863: error: for each function it appears in.)
gmake[1]: *** [chan_h323.o] Error 1
gmake: *** [channels] Error 2
----------------------------------------------------------------------

I have downloaded PWLIB v1.10.0 and OpenH323 v1.18.0 and they are both 
built and installed properly. Has anyone come across this issue, or do I 
have to log a bug report at Digiums bug tracker?

Thanks
Bruce