--- boost/asio/detail/config.hpp.orig	2015-03-23 21:24:12.000000000 +0100
+++ boost/asio/detail/config.hpp	2016-09-29 12:17:42.266966000 +0200
@@ -620,6 +620,7 @@
    || defined(_XOPEN_SOURCE) \
    || defined(_POSIX_SOURCE) \
    || (defined(__MACH__) && defined(__APPLE__)) \
+   || defined(__BSDSUniX__) \
    || defined(__FreeBSD__) \
    || defined(__NetBSD__) \
    || defined(__OpenBSD__) \
@@ -658,9 +659,10 @@
 # endif // !defined(BOOST_ASIO_HAS_TIMERFD)
 #endif // defined(__linux__)
 
-// Mac OS X, FreeBSD, NetBSD, OpenBSD: kqueue.
+// Mac OS X, BSDSUniX, FreeBSD, NetBSD, OpenBSD: kqueue.
 #if (defined(__MACH__) && defined(__APPLE__)) \
   || defined(__FreeBSD__) \
+  || defined(__BSDSUniX__) \
   || defined(__NetBSD__) \
   || defined(__OpenBSD__)
 # if !defined(BOOST_ASIO_HAS_KQUEUE)
@@ -669,6 +671,7 @@
 #  endif // !defined(BOOST_ASIO_DISABLE_KQUEUE)
 # endif // !defined(BOOST_ASIO_HAS_KQUEUE)
 #endif // (defined(__MACH__) && defined(__APPLE__))
+       //   || defined(__BSDSUniX__)
        //   || defined(__FreeBSD__)
        //   || defined(__NetBSD__)
        //   || defined(__OpenBSD__)