$OpenBSD: patch-sysdep_bsd_sysio_h,v 1.1 2017/03/02 23:02:18 sthen Exp $
--- sysdep/bsd/sysio.h.orig	Wed Feb 22 12:11:27 2017
+++ sysdep/bsd/sysio.h	Wed Feb 22 12:11:28 2017
@@ -198,7 +198,7 @@ sk_prepare_ip_header(sock *s, void *hdr, int dlen)
 #define TCP_SIG_SPI 0x1000
 #endif
 
-#if defined(__FreeBSD__)
+#if defined(__FreeBSD__) /* || defined(__OpenBSD__) */
 #define USE_MD5SIG_SETKEY
 #include "lib/setkey.h"
 #endif
