diff --git a/CHANGELOG.md b/CHANGELOG.md
index 618413e0..805820ca 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,4 @@
+* Fix compiler warning in WebSSocket async shutdown.
 * Remove Travis CI status.
 * Repoint B2 refs to new non-boostorg home.
 * Limit async_write instantiations in websocket ops.
diff --git a/include/boost/beast/websocket/impl/ssl.hpp b/include/boost/beast/websocket/impl/ssl.hpp
index 48f445f5..7b9bdd63 100644
--- a/include/boost/beast/websocket/impl/ssl.hpp
+++ b/include/boost/beast/websocket/impl/ssl.hpp
@@ -62,7 +62,7 @@ struct ssl_shutdown_op
 
     template<class Self>
     void
-    operator()(Self& self, error_code ec = {}, std::size_t bytes_transferred = 0)
+    operator()(Self& self, error_code ec = {}, std::size_t = 0)
     {
         BOOST_ASIO_CORO_REENTER(*this)
         {