diff --git a/include/boost/asio/experimental/parallel_group.hpp b/include/boost/asio/experimental/parallel_group.hpp
index e04dcc20..cd543108 100644
--- a/include/boost/asio/experimental/parallel_group.hpp
+++ b/include/boost/asio/experimental/parallel_group.hpp
@@ -201,7 +201,8 @@ private:
  * @endcode
  */
 template <typename... Ops>
-inline parallel_group<Ops...> make_parallel_group(Ops... ops)
+BOOST_ASIO_NODISCARD inline parallel_group<Ops...>
+make_parallel_group(Ops... ops)
 {
   return parallel_group<Ops...>(std::move(ops)...);
 }