diff --git a/test/beast/_experimental/stream.cpp b/test/beast/_experimental/stream.cpp
index 592dd388..9d7ab595 100644
--- a/test/beast/_experimental/stream.cpp
+++ b/test/beast/_experimental/stream.cpp
@@ -166,6 +166,7 @@ public:
         auto s2 = net::use_awaitable.as_default_on(std::move(s1));
 #ifdef BOOST_ASIO_HAS_DEFAULT_FUNCTION_TEMPLATE_ARGUMENTS
         auto bt = co_await s2.async_read_some(b);
+        ignore_unused(bt);
         bt = co_await s2.async_write_some(b);
 #else
         auto bt = co_await s2.async_read_some(b,