diff --git a/include/continuable/support/asio.hpp b/include/continuable/support/asio.hpp
index c74fd5f..387fef3 100644
--- a/include/continuable/support/asio.hpp
+++ b/include/continuable/support/asio.hpp
@@ -34,16 +34,21 @@
 #include <continuable/detail/support/asio.hpp>
 #include <continuable/detail/utility/traits.hpp>
 
+namespace cti {
+
+// Type used as an ASIO completion token to specify an asynchronous operation
+// should return a continuable.
+struct asio_token_t {};
+
+// Special value for instance of `asio_token_t`.
+constexpr asio_token_t asio_token{};
+
+} // namespace cti
+
 CTI_DETAIL_ASIO_NAMESPACE_BEGIN
 
-// Class used to specify an asynchronous operation should return a continuable.
-struct use_cti_t {};
-
-// Special value for instance of `use_cti_t`.
-constexpr use_cti_t use_cti{};
-
 template <typename Signature>
-class async_result<use_cti_t, Signature> {
+class async_result<cti::asio_token_t, Signature> {
 public:
 #if defined(CTI_DETAIL_ASIO_HAS_EXPLICIT_RET_TYPE_INTEGRATION)
   using return_type = typename cti::detail::asio::initiate_make_continuable<
@@ -51,7 +56,7 @@ public:
 #endif
 
   template <typename Initiation, typename... Args>
-  static auto initiate(Initiation initiation, use_cti_t, Args... args) {
+  static auto initiate(Initiation initiation, cti::asio_token_t, Args... args) {
     return cti::detail::asio::initiate_make_continuable<Signature>{}(
         [initiation = std::move(initiation),
          init_args =