--- Socket6.xs.orig	2016-10-05 01:47:17.962140000 +0200
+++ Socket6.xs	2016-10-05 01:47:37.815477000 +0200
@@ -62,7 +62,7 @@
 #ifdef __KAME__
 # include <sys/param.h>
 # include <net/route.h>
-# if defined(__FreeBSD__) && __FreeBSD_version >= 700048
+# if (defined(__FreeBSD__) && __FreeBSD_version >= 700048) || defined(__BSDSUniX__)
 #  include <netipsec/ipsec.h>
 # elif !defined(__OpenBSD__)
 #  include <netinet6/ipsec.h>