$OpenBSD: patch-ares_h,v 1.1 2016/09/10 13:03:40 ajacoutot Exp $
--- ares.h.orig	Sat Sep 10 12:52:43 2016
+++ ares.h	Sat Sep 10 12:53:10 2016
@@ -31,6 +31,7 @@
 #  define WIN32
 #endif
 
+#include <sys/select.h> /* fd_set */
 #include <sys/types.h>
 
 /* HP-UX systems version 9, 10 and 11 lack sys/select.h and so does oldish
