while this change don't seem to be necessary on NetBSD-current,
NetBSD-6 is the latest release at this point.
Signed-off-by: YAMAMOTO Takashi <yamt@mwd.biglobe.ne.jp>
Signed-off-by: Ben Pfaff <blp@nicira.com>
 #ifndef ROUTE_TABLE_H
 #define ROUTE_TABLE_H 1
 
+#include <sys/types.h>
 #include <sys/socket.h>
 #include <net/if.h>
 #include <stdbool.h>
 
 #include <netinet/in.h>
 #include <stdbool.h>
 #include "openvswitch/types.h"
+#include <netinet/in_systm.h>
 #include <netinet/ip.h>
 
 int set_nonblocking(int fd);