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diff --git a/boost/python/converter/obj_mgr_arg_from_python.hpp b/boost/python/converter/obj_mgr_arg_from_python.hpp
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+// Copyright David Abrahams 2002.
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+#ifndef OBJ_MGR_ARG_FROM_PYTHON_DWA2002628_HPP
+# define OBJ_MGR_ARG_FROM_PYTHON_DWA2002628_HPP
+
+# include <boost/python/detail/prefix.hpp>
+# include <boost/python/detail/referent_storage.hpp>
+# include <boost/python/detail/destroy.hpp>
+# include <boost/python/detail/construct.hpp>
+# include <boost/python/converter/object_manager.hpp>
+# include <boost/python/detail/raw_pyobject.hpp>
+# include <boost/python/tag.hpp>
+
+//
+// arg_from_python converters for Python type wrappers, to be used as
+// base classes for specializations.
+//
+namespace boost { namespace python { namespace converter { 
+
+template <class T>
+struct object_manager_value_arg_from_python
+{
+    typedef T result_type;
+    
+    object_manager_value_arg_from_python(PyObject*);
+    bool convertible() const;
+    T operator()() const;
+ private:
+    PyObject* m_source;
+};
+
+// Used for converting reference-to-object-manager arguments from
+// python. The process used here is a little bit odd. Upon
+// construction, we build the object manager object in the m_result
+// object, *forcing* it to accept the source Python object by casting
+// its pointer to detail::borrowed_reference. This is supposed to
+// bypass any type checking of the source object. The convertible
+// check then extracts the owned object and checks it. If the check
+// fails, nothing else in the program ever gets to touch this strange
+// "forced" object.
+template <class Ref>
+struct object_manager_ref_arg_from_python
+{
+    typedef Ref result_type;
+    
+    object_manager_ref_arg_from_python(PyObject*);
+    bool convertible() const;
+    Ref operator()() const;
+    ~object_manager_ref_arg_from_python();
+ private:
+    typename python::detail::referent_storage<Ref>::type m_result;
+};
+
+//
+// implementations
+//
+
+template <class T>
+inline object_manager_value_arg_from_python<T>::object_manager_value_arg_from_python(PyObject* x)
+    : m_source(x)
+{
+}
+    
+template <class T>
+inline bool object_manager_value_arg_from_python<T>::convertible() const
+{
+    return object_manager_traits<T>::check(m_source);
+}
+
+template <class T>
+inline T object_manager_value_arg_from_python<T>::operator()() const
+{
+    return T(python::detail::borrowed_reference(m_source));
+}
+
+template <class Ref>
+inline object_manager_ref_arg_from_python<Ref>::object_manager_ref_arg_from_python(PyObject* x)
+{
+# if defined(__EDG_VERSION__) && __EDG_VERSION__ <= 243
+    // needed for warning suppression
+    python::detail::borrowed_reference x_ = python::detail::borrowed_reference(x);
+    python::detail::construct_referent<Ref>(&m_result.bytes, x_);
+# else 
+    python::detail::construct_referent<Ref>(&m_result.bytes, (python::detail::borrowed_reference)x);
+# endif 
+}
+
+template <class Ref>
+inline object_manager_ref_arg_from_python<Ref>::~object_manager_ref_arg_from_python()
+{
+    python::detail::destroy_referent<Ref>(this->m_result.bytes);
+}
+
+namespace detail
+{
+  template <class T>
+  inline bool object_manager_ref_check(T const& x)
+  {
+      return object_manager_traits<T>::check(get_managed_object(x, tag));
+  }
+}
+
+template <class Ref>
+inline bool object_manager_ref_arg_from_python<Ref>::convertible() const
+{
+    return detail::object_manager_ref_check(
+        python::detail::void_ptr_to_reference(this->m_result.bytes, (Ref(*)())0));
+}
+
+template <class Ref>
+inline Ref object_manager_ref_arg_from_python<Ref>::operator()() const
+{
+    return python::detail::void_ptr_to_reference(
+        this->m_result.bytes, (Ref(*)())0);
+}
+
+}}} // namespace boost::python::converter
+
+#endif // OBJ_MGR_ARG_FROM_PYTHON_DWA2002628_HPP