$OpenBSD: patch-sysdep_bsd_sysio_h,v 1.2 2019/01/09 15:04:50 sthen Exp $
Index: sysdep/bsd/sysio.h
--- sysdep/bsd/sysio.h.orig
+++ sysdep/bsd/sysio.h
@@ -204,7 +204,7 @@ 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
