diff --git a/include/continuable/detail/base.hpp b/include/continuable/detail/base.hpp
index ce861c0..71f1cd6 100644
--- a/include/continuable/detail/base.hpp
+++ b/include/continuable/detail/base.hpp
@@ -504,7 +504,7 @@ auto chain_continuation(Continuation&& continuation, Callback&& callback,
   static_assert(is_continuable<std::decay_t<Continuation>>{},
                 "Expected a continuation!");
 
-  using Hint = decltype(hints::hint_of(traits::identity_of(continuation)));
+  using Hint = decltype(hints::hint_of(traits::identify<Continuation>()));
   constexpr auto next_hint =
       next_hint_of(std::integral_constant<handle_results, HandleResults>{},
                    traits::identify<decltype(callback)>{}, Hint{});
diff --git a/include/continuable/detail/composition_any.hpp b/include/continuable/detail/composition_any.hpp
index 5e28fa3..3a0fafe 100644
--- a/include/continuable/detail/composition_any.hpp
+++ b/include/continuable/detail/composition_any.hpp
@@ -113,9 +113,9 @@ struct check_pack_empty {
 /// A callable object to determine the shared result between all continuations
 struct determine_shared_result {
   template <typename... T>
-  constexpr auto operator()(T&... args) const noexcept {
+  constexpr auto operator()(T&&...) const noexcept {
     return common_result_of(hints::signature_hint_tag<>{},
-                            hints::hint_of(traits::identity_of(args))...);
+                            hints::hint_of(traits::identify<T>())...);
   }
 
 private:
diff --git a/test/playground/test-playground.cpp b/test/playground/test-playground.cpp
index 17ead1f..151cffb 100644
--- a/test/playground/test-playground.cpp
+++ b/test/playground/test-playground.cpp
@@ -126,5 +126,6 @@ int main(int, char**) {
                     cti::make_ready_continuable(0, 1), 2)
       .then([](int a0, int a1, int a2) {
         // ...
+        util::unused(a0, a1, a2);
       });
 }