diff -r db3d6a500678 -r 228c316f1323 configure.ac
--- a/configure.ac	Mon Jun 16 15:19:11 2008 +0000
+++ b/configure.ac	Wed Jun 18 00:24:44 2008 +0000
@@ -2223,9 +2223,11 @@
 AC_CHECK_HEADERS(termios.h)
 
 # sys/sysctl.h on OpenBSD 4.2 requires sys/param.h
+# sys/sysctl.h on FreeBSD requires sys/types.h
 AC_CHECK_HEADERS(sys/param.h)
 AC_CHECK_HEADERS(sys/sysctl.h, [], [],
 	[[
+		#include <sys/types.h>
 		#ifdef HAVE_PARAM_H
 		# include <sys/param.h>
 		#endif