diff --git a/include/boost/asio/bind_cancellation_slot.hpp b/include/boost/asio/bind_cancellation_slot.hpp
index 7bae4bd2..eafb8ec4 100644
--- a/include/boost/asio/bind_cancellation_slot.hpp
+++ b/include/boost/asio/bind_cancellation_slot.hpp
@@ -459,7 +459,8 @@ private:
 /// Associate an object of type @c T with a cancellation slot of type
 /// @c CancellationSlot.
 template <typename CancellationSlot, typename T>
-inline cancellation_slot_binder<typename decay<T>::type, CancellationSlot>
+BOOST_ASIO_NODISCARD inline
+cancellation_slot_binder<typename decay<T>::type, CancellationSlot>
 bind_cancellation_slot(const CancellationSlot& s, BOOST_ASIO_MOVE_ARG(T) t)
 {
   return cancellation_slot_binder<