diff --git a/include/boost/container/flat_set.hpp b/include/boost/container/flat_set.hpp
index 080beb5..4d4ae47 100644
--- a/include/boost/container/flat_set.hpp
+++ b/include/boost/container/flat_set.hpp
@@ -1031,7 +1031,7 @@ class flat_set
    //! <b>Complexity</b>: Logarithmic
    template<typename K>
    std::pair<iterator,iterator> equal_range(const K& x)
-   {  return this->tree_t::lower_bound_range(x);  }
+   {  return this->tree_t::equal_range(x);  }
 
    //! <b>Requires</b>: This overload is available only if
    //! key_compare::is_transparent exists.
@@ -1041,7 +1041,7 @@ class flat_set
    //! <b>Complexity</b>: Logarithmic
    template<typename K>
    std::pair<const_iterator,const_iterator> equal_range(const K& x) const
-   {  return this->tree_t::lower_bound_range(x);  }
+   {  return this->tree_t::equal_range(x);  }
 
    #if defined(BOOST_CONTAINER_DOXYGEN_INVOKED)