$OpenBSD: patch-bgpq_expander_c,v 1.1 2016/09/10 13:03:42 ajacoutot Exp $
--- bgpq_expander.c.orig	Sat Sep 10 11:46:59 2016
+++ bgpq_expander.c	Sat Sep 10 11:47:15 2016
@@ -15,6 +15,7 @@
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <sys/select.h> /* fd_set */
 #include <unistd.h>
 
 #include "bgpq3.h"
