diff --git a/include/boost/weak_ptr.hpp b/include/boost/weak_ptr.hpp
index 33d762d..356ab60 100644
--- a/include/boost/weak_ptr.hpp
+++ b/include/boost/weak_ptr.hpp
@@ -51,29 +51,6 @@ public:
     {
     }
 
-    template<typename Y>
-    weak_ptr(weak_ptr<Y> const & r, detail::static_cast_tag): px(static_cast<element_type *>(r.px)), pn(r.pn)
-    {
-    }
-
-    template<typename Y>
-    weak_ptr(weak_ptr<Y> const & r, detail::dynamic_cast_tag): px(dynamic_cast<element_type *>(r.px)), pn(r.pn)
-    {
-        if (px == 0) // need to allocate new counter -- the cast failed
-        {
-            pn = detail::weak_count();
-        }
-    }
-
-    template<typename Y>
-    weak_ptr(weak_ptr<Y> const & r, detail::polymorphic_cast_tag): px(dynamic_cast<element_type *>(r.px)), pn(r.pn)
-    {
-        if (px == 0)
-        {
-            throw std::bad_cast();
-        }
-    }
-
     template<typename Y>
     weak_ptr & operator=(weak_ptr<Y> const & r) // never throws
     {
@@ -187,27 +164,6 @@ template<class T> shared_ptr<T> make_shared(weak_ptr<T> const & r) // never thro
     }
 }
 
-template<class T, class U> weak_ptr<T> shared_static_cast(weak_ptr<U> const & r)
-{
-    return weak_ptr<T>(r, detail::static_cast_tag());
-}
-
-template<class T, class U> weak_ptr<T> shared_dynamic_cast(weak_ptr<U> const & r)
-{
-    return weak_ptr<T>(r, detail::dynamic_cast_tag());
-}
-
-template<typename T, typename U> weak_ptr<T> shared_polymorphic_cast(weak_ptr<U> const & r)
-{
-    return weak_ptr<T>(r, detail::polymorphic_cast_tag());
-}
-
-template<typename T, typename U> weak_ptr<T> shared_polymorphic_downcast(weak_ptr<U> const & r)
-{
-    BOOST_ASSERT(dynamic_cast<T *>(r.get()) == r.get());
-    return shared_static_cast<T>(r);
-}
-
 } // namespace boost
 
 #ifdef BOOST_MSVC
diff --git a/shared_ptr_test.cpp b/shared_ptr_test.cpp
index 0e4e86b..7b1b960 100644
--- a/shared_ptr_test.cpp
+++ b/shared_ptr_test.cpp
@@ -244,7 +244,7 @@ int test_main(int, char * [])
             test_is_nonzero(boost::make_shared(wp2));
         }
 
-        weak_ptr<Y> wp3 = shared_dynamic_cast<Y>(wp2);
+		weak_ptr<Y> wp3 = shared_dynamic_cast<Y>(boost::make_shared(wp2));
 
         BOOST_TEST(wp3.use_count() == 1);
         BOOST_TEST(wp3.get() != 0);