diff --git a/devel/boost/Makefile b/devel/boost/Makefile
index 09a1e8976ae..09a68c6176f 100644
--- a/devel/boost/Makefile
+++ b/devel/boost/Makefile
@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile,v 1.45 2013/03/26 20:15:10 brad Exp $
+# $OpenBSD: Makefile,v 1.46 2013/04/12 01:11:32 brad Exp $
 
 ONLY_FOR_ARCHS=	${GCC4_ARCHS}
 
@@ -7,7 +7,7 @@ COMMENT=	free peer-reviewed portable C++ source libraries
 VERSION=	1.53.0
 DISTNAME=	boost_${VERSION:S/./_/g}
 PKGNAME=	boost-${VERSION}
-REVISION=	0
+REVISION=	1
 CATEGORIES=	devel
 MASTER_SITES=	${MASTER_SITE_SOURCEFORGE:=boost/}
 EXTRACT_SUFX=	.tar.bz2
diff --git a/devel/boost/patches/patch-boost_config_posix_features_hpp b/devel/boost/patches/patch-boost_config_posix_features_hpp
new file mode 100644
index 00000000000..278a71bf02d
--- /dev/null
+++ b/devel/boost/patches/patch-boost_config_posix_features_hpp
@@ -0,0 +1,55 @@
+$OpenBSD: patch-boost_config_posix_features_hpp,v 1.1 2013/04/12 01:11:32 brad Exp $
+--- boost/config/posix_features.hpp.orig	Thu Apr  4 12:57:07 2013
++++ boost/config/posix_features.hpp	Thu Apr  4 13:11:54 2013
+@@ -18,12 +18,12 @@
+ #     include <unistd.h>
+ 
+       // XOpen has <nl_types.h>, but is this the correct version check?
+-#     if defined(_XOPEN_VERSION) && (_XOPEN_VERSION >= 3)
++#     if defined(_XOPEN_VERSION) && (_XOPEN_VERSION >= 3) || defined(__OpenBSD__)
+ #        define BOOST_HAS_NL_TYPES_H
+ #     endif
+ 
+       // POSIX version 6 requires <stdint.h>
+-#     if defined(_POSIX_VERSION) && (_POSIX_VERSION >= 200100)
++#     if defined(_POSIX_VERSION) && (_POSIX_VERSION >= 200100) || defined(__OpenBSD__)
+ #        define BOOST_HAS_STDINT_H
+ #     endif
+ 
+@@ -33,7 +33,7 @@
+ #     endif
+ 
+       // POSIX version 3 requires <signal.h> to have sigaction:
+-#     if defined(_POSIX_VERSION) && (_POSIX_VERSION >= 199506L)
++#     if defined(_POSIX_VERSION) && (_POSIX_VERSION >= 199506L) || defined(__OpenBSD__)
+ #        define BOOST_HAS_SIGACTION
+ #     endif
+       // POSIX defines _POSIX_THREADS > 0 for pthread support,
+@@ -49,7 +49,8 @@
+       // BOOST_HAS_NANOSLEEP:
+       // This is predicated on _POSIX_TIMERS or _XOPEN_REALTIME:
+ #     if (defined(_POSIX_TIMERS) && (_POSIX_TIMERS+0 >= 0)) \
+-             || (defined(_XOPEN_REALTIME) && (_XOPEN_REALTIME+0 >= 0))
++             || (defined(_XOPEN_REALTIME) && (_XOPEN_REALTIME+0 >= 0) \
++             || defined(__OpenBSD__))
+ #        define BOOST_HAS_NANOSLEEP
+ #     endif
+ 
+@@ -57,7 +58,7 @@
+       // This is predicated on _POSIX_TIMERS (also on _XOPEN_REALTIME
+       // but at least one platform - linux - defines that flag without
+       // defining clock_gettime):
+-#     if (defined(_POSIX_TIMERS) && (_POSIX_TIMERS+0 >= 0))
++#     if (defined(_POSIX_TIMERS) && (_POSIX_TIMERS+0 >= 0) || defined(__OpenBSD__))
+ #        define BOOST_HAS_CLOCK_GETTIME
+ #     endif
+ 
+@@ -75,7 +76,7 @@
+       // These are predicated on _XOPEN_VERSION, and appears to be first released
+       // in issue 4, version 2 (_XOPEN_VERSION > 500).
+       // Likewise for the functions log1p and expm1.
+-#     if defined(_XOPEN_VERSION) && (_XOPEN_VERSION+0 >= 500)
++#     if defined(_XOPEN_VERSION) && (_XOPEN_VERSION+0 >= 500) || defined(__OpenBSD__)
+ #        define BOOST_HAS_GETTIMEOFDAY
+ #        if defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE+0 >= 500)
+ #           define BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE