diff --git a/dev-libs/libxml2/libxml2-2.9.0.bep b/dev-libs/libxml2/libxml2-2.9.0.bep
index e5659cf25..70bf22569 100644
--- a/dev-libs/libxml2/libxml2-2.9.0.bep
+++ b/dev-libs/libxml2/libxml2-2.9.0.bep
@@ -16,7 +16,8 @@ BUILD {
 	./configure --prefix=`finddir B_COMMON_DIRECTORY` \
 		--datarootdir=$COMMON_DOCS \
 		--docdir=$COMMON_DOCS/doc \
-		--mandir=$COMMON_DOCS/man
+		--mandir=$COMMON_DOCS/man \
+		--with-threads=yes
 		LDFLAGS="-lnetwork"
 	make
 }
diff --git a/dev-libs/libxml2/patches/libxml2-2.9.0.patch b/dev-libs/libxml2/patches/libxml2-2.9.0.patch
new file mode 100644
index 000000000..b5ca0e802
--- /dev/null
+++ b/dev-libs/libxml2/patches/libxml2-2.9.0.patch
@@ -0,0 +1,33 @@
+--- libxml2-2.9.0-orig/threads.c	2012-09-11 03:52:46.000000000 +0000
++++ libxml2-2.9.0/threads.c	2013-02-12 20:44:23.000000000 +0000
+@@ -146,6 +146,7 @@
+ static pthread_key_t globalkey;
+ static pthread_t mainthread;
+ static pthread_once_t once_control = PTHREAD_ONCE_INIT;
++static pthread_once_t once_control_init = PTHREAD_ONCE_INIT;
+ static pthread_mutex_t global_init_lock = PTHREAD_MUTEX_INITIALIZER;
+ #elif defined HAVE_WIN32_THREADS
+ #if defined(HAVE_COMPILER_TLS)
+@@ -915,7 +916,7 @@
+ #ifdef HAVE_PTHREAD_H
+     if ((libxml_is_threaded)  && (pthread_key_delete != NULL))
+         pthread_key_delete(globalkey);
+-    once_control = PTHREAD_ONCE_INIT;
++    once_control = once_control_init;
+ #elif defined(HAVE_WIN32_THREADS) && !defined(HAVE_COMPILER_TLS) && (!defined(LIBXML_STATIC) || defined(LIBXML_STATIC_FOR_DLL))
+     if (globalkey != TLS_OUT_OF_INDEXES) {
+         xmlGlobalStateCleanupHelperParams *p;
+--- libxml2-2.9.0-orig/configure.in	2012-09-11 03:52:46.053739520 +0000
++++ libxml2-2.9.0/configure.in	2013-02-12 20:37:19.000000000 +0000
+@@ -988,6 +988,11 @@
+        *beos*) WITH_THREADS="1"
+ 	   THREAD_CFLAGS="$THREAD_CFLAGS -DHAVE_BEOS_THREADS"
+        ;;
++       *haiku*) WITH_THREADS="1"
++       THREAD_LIB=""
++       AC_DEFINE([HAVE_PTHREAD_H], [], [Define if <pthread.h> is there])
++       ;;
++   
+        *linux*)
+            if test "${GCC}" = "yes" ; then
+ 	       GCC_VERSION=`${CC} --version | head -1 | awk '{print $3}'`