diff --git a/include/boost/function/function_base.hpp b/include/boost/function/function_base.hpp
index 86f54c7..7795143 100644
--- a/include/boost/function/function_base.hpp
+++ b/include/boost/function/function_base.hpp
@@ -24,7 +24,7 @@
 #include <boost/config.hpp>
 #include <boost/type_traits.hpp>
 #include <boost/ref.hpp>
-#include <boost/thread/model/single.hpp>
+#include <boost/function/threading/single.hpp>
 #include <boost/pending/ct_if.hpp>
 
 #if defined(BOOST_MSVC) && BOOST_MSVC <= 1300 || defined(__ICL) && __ICL <= 600 || defined(__MWERKS__) && __MWERKS__ < 0x2406
diff --git a/include/boost/function/threading/detail/mutex_mixin.hpp b/include/boost/function/threading/detail/mutex_mixin.hpp
new file mode 100644
index 0000000..0bdb4a2
--- /dev/null
+++ b/include/boost/function/threading/detail/mutex_mixin.hpp
@@ -0,0 +1,48 @@
+// Copyright (C) 2002
+// Doug Gregor (gregod@cs.rpi.edu)
+//
+// Permission to use, copy, modify, distribute and sell this software
+// and its documentation for any purpose is hereby granted without fee,
+// provided that the above copyright notice appear in all copies and
+// that both that copyright notice and this permission notice appear
+// in supporting documentation.  William E. Kempf makes no representations
+// about the suitability of this software for any purpose.
+// It is provided "as is" without express or implied warranty.
+#ifndef BOOST_THREAD_MODEL_DETAIL_MUTEX_MIXIN_HPP
+#define BOOST_THREAD_MODEL_DETAIL_MUTEX_MIXIN_HPP
+
+namespace boost {
+namespace detail {
+
+template<typename Mutex>
+class mutex_mixin
+{
+public:
+  mutex_mixin(const mutex_mixin&) {}
+  mutex_mixin& operator=(const mutex_mixin&) { return *this; }
+
+  operator const Mutex&() const { return mutex; }
+  operator Mutex&() { return mutex; }
+
+private:
+  Mutex mutex;
+};
+
+template<typename Mutex>
+class static_mutex_mixin
+{
+public:
+  static_mutex_mixin(const mutex_mixin&) {}
+  static_mutex_mixin& operator=(const mutex_mixin&) { return *this; }
+
+  operator const Mutex&() const { return mutex; }
+  operator Mutex&() { return mutex; }
+
+private:
+  static Mutex mutex;
+};
+
+} // end namespace detail
+} // end namespace boost
+
+#endif // BOOST_THREAD_MODEL_DETAIL_MUTEX_MIXIN_HPP
diff --git a/include/boost/function/threading/per_class.hpp b/include/boost/function/threading/per_class.hpp
new file mode 100644
index 0000000..7cebb5c
--- /dev/null
+++ b/include/boost/function/threading/per_class.hpp
@@ -0,0 +1,28 @@
+// Copyright (C) 2002
+// Doug Gregor (gregod@cs.rpi.edu)
+//
+// Permission to use, copy, modify, distribute and sell this software
+// and its documentation for any purpose is hereby granted without fee,
+// provided that the above copyright notice appear in all copies and
+// that both that copyright notice and this permission notice appear
+// in supporting documentation.  William E. Kempf makes no representations
+// about the suitability of this software for any purpose.
+// It is provided "as is" without express or implied warranty.
+#ifndef BOOST_THREAD_MODEL_PER_CLASS_HPP
+#define BOOST_THREAD_MODEL_PER_CLASS_HPP
+
+#include <boost/thread/mutex.hpp>
+#include <boost/thread/model/detail/mutex_mixin.hpp>
+
+namespace boost {
+
+  template<typename Mutex = boost::mutex>
+  struct per_class_locking
+  {
+    typedef detail::static_mutex_mixin<Mutex> mixin;
+    typedef typename Mutex::scoped_lock lock;
+  };
+
+} // end namespace boost
+
+#endif // BOOST_THREAD_MODEL_PER_CLASS_HPP
diff --git a/include/boost/function/threading/per_object.hpp b/include/boost/function/threading/per_object.hpp
new file mode 100644
index 0000000..338cb7f
--- /dev/null
+++ b/include/boost/function/threading/per_object.hpp
@@ -0,0 +1,28 @@
+// Copyright (C) 2002
+// Doug Gregor (gregod@cs.rpi.edu)
+//
+// Permission to use, copy, modify, distribute and sell this software
+// and its documentation for any purpose is hereby granted without fee,
+// provided that the above copyright notice appear in all copies and
+// that both that copyright notice and this permission notice appear
+// in supporting documentation.  William E. Kempf makes no representations
+// about the suitability of this software for any purpose.
+// It is provided "as is" without express or implied warranty.
+#ifndef BOOST_THREAD_MODEL_PER_OBJECT_HPP
+#define BOOST_THREAD_MODEL_PER_OBJECT_HPP
+
+#include <boost/thread/mutex.hpp>
+#include <boost/thread/model/detail/mutex_mixin.hpp>
+
+namespace boost {
+
+  template<typename Mutex = boost::mutex>
+  struct per_object_locking
+  {
+    typedef detail::mutex_mixin<Mutex> mixin;
+    typedef typename Mutex::scoped_lock lock;
+  };
+
+} // end namespace boost
+
+#endif // BOOST_THREAD_MODEL_PER_OBJECT_HPP
diff --git a/include/boost/function/threading/single.hpp b/include/boost/function/threading/single.hpp
new file mode 100644
index 0000000..c9724c1
--- /dev/null
+++ b/include/boost/function/threading/single.hpp
@@ -0,0 +1,27 @@
+// Copyright (C) 2002
+// Doug Gregor (gregod@cs.rpi.edu)
+//
+// Permission to use, copy, modify, distribute and sell this software
+// and its documentation for any purpose is hereby granted without fee,
+// provided that the above copyright notice appear in all copies and
+// that both that copyright notice and this permission notice appear
+// in supporting documentation.  William E. Kempf makes no representations
+// about the suitability of this software for any purpose.
+// It is provided "as is" without express or implied warranty.
+#ifndef BOOST_THREAD_MODEL_SINGLE_HPP
+#define BOOST_THREAD_MODEL_SINGLE_HPP
+
+namespace boost {
+
+struct single_threaded {
+  struct mixin {};
+
+  struct lock 
+  {
+    lock(const mixin&) {}
+  };
+};
+
+} // end namespace boost
+
+#endif // BOOST_THREAD_MODEL_SINGLE_HPP