diff --git a/include/utempl/utils.hpp b/include/utempl/utils.hpp
index a44d10f..cdad54b 100644
--- a/include/utempl/utils.hpp
+++ b/include/utempl/utils.hpp
@@ -162,10 +162,10 @@ template <typename T>
 concept TupleLike = kForceEnableTuple<std::remove_cvref_t<T>> || (requires{Get<0>(MakeTuple<T>(42));} && impl::IsSafeTuple<std::remove_cvref_t<T>>::value);
 
 
-template <TupleLike Tuple>
-inline constexpr auto Transform(Tuple&& container, auto&& f) {
+template <TupleLike Tuple, typename R = Tuple>
+inline constexpr auto Transform(Tuple&& container, auto&& f, TypeList<R> = {}) {
   return [&]<auto... Is>(std::index_sequence<Is...>){
-    return MakeTuple<Tuple>(f(Get<Is>(std::forward<Tuple>(container)))...);
+    return MakeTuple<R>(f(Get<Is>(std::forward<Tuple>(container)))...);
   }(std::make_index_sequence<kTupleSize<Tuple>>());
 };