diff --git a/include/boost/container/detail/advanced_insert_int.hpp b/include/boost/container/detail/advanced_insert_int.hpp
index 56df588..278cd1b 100644
--- a/include/boost/container/detail/advanced_insert_int.hpp
+++ b/include/boost/container/detail/advanced_insert_int.hpp
@@ -236,7 +236,7 @@ struct insert_nonmovable_emplace_proxy
    {  this->priv_uninitialized_copy_some_and_update(a, index_tuple_t(), p, n);  }
 
    private:
-   template<int ...IdxPack>
+   template<std::size_t ...IdxPack>
    void priv_uninitialized_copy_some_and_update(Allocator &a, const index_tuple<IdxPack...>&, Iterator p, size_type n)
    {
       BOOST_ASSERT(n == 1); (void)n;
@@ -266,7 +266,7 @@ struct insert_emplace_proxy
 
    private:
 
-   template<int ...IdxPack>
+   template<std::size_t ...IdxPack>
    void priv_copy_some_and_update(Allocator &a, const index_tuple<IdxPack...>&, Iterator p, size_type n)
    {
       BOOST_ASSERT(n ==1); (void)n;
diff --git a/include/boost/container/detail/variadic_templates_tools.hpp b/include/boost/container/detail/variadic_templates_tools.hpp
index d8c8443..f9b022f 100644
--- a/include/boost/container/detail/variadic_templates_tools.hpp
+++ b/include/boost/container/detail/variadic_templates_tools.hpp
@@ -135,18 +135,18 @@ typename get_impl<I, tuple<Values...> >::const_type get(const tuple<Values...>&
 // in a function call.
 ////////////////////////////////////////////////////
 
-template<int... Indexes>
+template<std::size_t ... Indexes>
 struct index_tuple{};
 
 template<std::size_t Num, typename Tuple = index_tuple<> >
 struct build_number_seq;
 
-template<std::size_t Num, int... Indexes>
+template<std::size_t Num, std::size_t ... Indexes>
 struct build_number_seq<Num, index_tuple<Indexes...> >
    : build_number_seq<Num - 1, index_tuple<Indexes..., sizeof...(Indexes)> >
 {};
 
-template<int... Indexes>
+template<std::size_t ... Indexes>
 struct build_number_seq<0, index_tuple<Indexes...> >
 {  typedef index_tuple<Indexes...> type;  };