diff --git a/include/boost/pfr/detail/stdtuple.hpp b/include/boost/pfr/detail/stdtuple.hpp
index 4359e34..71424e0 100644
--- a/include/boost/pfr/detail/stdtuple.hpp
+++ b/include/boost/pfr/detail/stdtuple.hpp
@@ -18,6 +18,7 @@ namespace boost { namespace pfr { namespace detail {
 
 template <class T, std::size_t... I>
 constexpr auto make_stdtuple_from_tietuple(const T& t, std::index_sequence<I...>) {
+    (void)t;  // workaround for MSVC 14.1 `warning C4100: 't': unreferenced formal parameter`
     return std::make_tuple(
         boost::pfr::detail::sequence_tuple::get<I>(t)...
     );
@@ -25,6 +26,7 @@ constexpr auto make_stdtuple_from_tietuple(const T& t, std::index_sequence<I...>
 
 template <class T, std::size_t... I>
 constexpr auto make_stdtiedtuple_from_tietuple(const T& t, std::index_sequence<I...>) noexcept {
+    (void)t;  // workaround for MSVC 14.1 `warning C4100: 't': unreferenced formal parameter`
     return std::tie(
         boost::pfr::detail::sequence_tuple::get<I>(t)...
     );
@@ -32,6 +34,7 @@ constexpr auto make_stdtiedtuple_from_tietuple(const T& t, std::index_sequence<I
 
 template <class T, std::size_t... I>
 constexpr auto make_conststdtiedtuple_from_tietuple(const T& t, std::index_sequence<I...>) noexcept {
+    (void)t;  // workaround for MSVC 14.1 `warning C4100: 't': unreferenced formal parameter`
     return std::tuple<
         std::add_lvalue_reference_t<std::add_const_t<
             std::remove_reference_t<decltype(boost::pfr::detail::sequence_tuple::get<I>(t))>