diff --git a/asio/include/asio/experimental/impl/as_single.hpp b/asio/include/asio/experimental/impl/as_single.hpp
index cd2c0abb..dfceba5f 100644
--- a/asio/include/asio/experimental/impl/as_single.hpp
+++ b/asio/include/asio/experimental/impl/as_single.hpp
@@ -75,19 +75,29 @@ public:
 };
 
 template <typename Handler>
-inline void* asio_handler_allocate(std::size_t size,
+inline asio_handler_allocate_is_deprecated
+asio_handler_allocate(std::size_t size,
     as_single_handler<Handler>* this_handler)
 {
+#if defined(ASIO_NO_DEPRECATED)
+  asio_handler_alloc_helpers::allocate(size, this_handler->handler_);
+  return asio_handler_allocate_is_no_longer_used();
+#else // defined(ASIO_NO_DEPRECATED)
   return asio_handler_alloc_helpers::allocate(
       size, this_handler->handler_);
+#endif // defined(ASIO_NO_DEPRECATED)
 }
 
 template <typename Handler>
-inline void asio_handler_deallocate(void* pointer, std::size_t size,
+inline asio_handler_deallocate_is_deprecated
+asio_handler_deallocate(void* pointer, std::size_t size,
     as_single_handler<Handler>* this_handler)
 {
   asio_handler_alloc_helpers::deallocate(
       pointer, size, this_handler->handler_);
+#if defined(ASIO_NO_DEPRECATED)
+  return asio_handler_deallocate_is_no_longer_used();
+#endif // defined(ASIO_NO_DEPRECATED)
 }
 
 template <typename Handler>
@@ -99,19 +109,27 @@ inline bool asio_handler_is_continuation(
 }
 
 template <typename Function, typename Handler>
-inline void asio_handler_invoke(Function& function,
+inline asio_handler_invoke_is_deprecated
+asio_handler_invoke(Function& function,
     as_single_handler<Handler>* this_handler)
 {
   asio_handler_invoke_helpers::invoke(
       function, this_handler->handler_);
+#if defined(ASIO_NO_DEPRECATED)
+  return asio_handler_invoke_is_no_longer_used();
+#endif // defined(ASIO_NO_DEPRECATED)
 }
 
 template <typename Function, typename Handler>
-inline void asio_handler_invoke(const Function& function,
+inline asio_handler_invoke_is_deprecated
+asio_handler_invoke(const Function& function,
     as_single_handler<Handler>* this_handler)
 {
   asio_handler_invoke_helpers::invoke(
       function, this_handler->handler_);
+#if defined(ASIO_NO_DEPRECATED)
+  return asio_handler_invoke_is_no_longer_used();
+#endif // defined(ASIO_NO_DEPRECATED)
 }
 
 template <typename Signature>