diff --git a/include/boost/container/set.hpp b/include/boost/container/set.hpp
index 6f7f6ff..8730b1c 100644
--- a/include/boost/container/set.hpp
+++ b/include/boost/container/set.hpp
@@ -688,6 +688,12 @@ class set
    //! <b>Complexity</b>: log(size())+N where N is the distance from first to last.
    iterator erase(const_iterator first, const_iterator last);
 
+   //! @copydoc ::boost::container::map::extract(const_iterator)
+   node_type extract(const_iterator p);
+
+   //! @copydoc ::boost::container::map::extract(const key_type&)
+   node_type extract(const key_type& x);
+
    //! <b>Effects</b>: Swaps the contents of *this and x.
    //!
    //! <b>Throws</b>: Nothing.
@@ -1298,6 +1304,12 @@ class multiset
    //! @copydoc ::boost::container::set::erase(const_iterator,const_iterator)
    iterator erase(const_iterator first, const_iterator last);
 
+   //! @copydoc ::boost::container::multimap::extract(const_iterator)
+   node_type extract(const_iterator p);
+
+   //! @copydoc ::boost::container::multimap::extract(const key_type&)
+   node_type extract(const key_type& x);
+
    //! @copydoc ::boost::container::set::swap
    void swap(multiset& x)
       BOOST_NOEXCEPT_IF(  allocator_traits_type::is_always_equal::value