I don't think that would be appropriate, as systems that have sys/time.h may not always have sys/types.h .. I think probably
#ifdef HAVE_SYS_TYPES_H #include <sys/types.h> #endif
and of course you gotta have the lines to define HVE_SYS_TYPES_H
If you don't know autoconf very well, just look for where all of the #defines are, and see how its checking for sys/time.h, and copy/paste that for sys/types.h ..
Of course I could be going about this all wrong as I'm not one of the developers. Just my $0.02.
Dustin