diff --git a/server_http.hpp b/server_http.hpp
index 5d3ba4f..b4e5e68 100644
--- a/server_http.hpp
+++ b/server_http.hpp
@@ -406,7 +406,7 @@ namespace SimpleWeb {
 #if defined(__linux__) && defined(TCP_FASTOPEN)
         const int qlen = 5; // This seems to be the value that is used in other examples.
         boost::system::error_code ec;
-        acceptor->set_option(boost::asio::detail::socket_option::integer<IPPROTO_TCP, TCP_FASTOPEN>(qlen), ec);
+        acceptor->set_option(asio::detail::socket_option::integer<IPPROTO_TCP, TCP_FASTOPEN>(qlen), ec);
 #endif // End Linux
       }
       acceptor->bind(endpoint);