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closes #2198

test/beast/_experimental/stream.cpp

@@ -164,8 +164,15 @@ public:
         auto ex = co_await net::this_coro::executor;
         auto s1 = test::stream(ex);
         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);
         bt = co_await s2.async_write_some(b);
+#else
+        auto bt = co_await s2.async_read_some(b,
+            net::use_awaitable);
+        bt = co_await s2.async_write_some(b,
+            net::use_awaitable);
+#endif
     }
 #endif