$OpenBSD$
--- src/os/bsd/os.c.orig	Sun May 21 17:21:53 2006
+++ src/os/bsd/os.c	Fri Jun 16 11:06:02 2006
@@ -22,6 +22,7 @@
 #include <string.h>
 #include <stdlib.h>
 #include <dlfcn.h>
+#include <sys/param.h>
 #include <sys/types.h>
 #include <sys/sysctl.h>
 
