diff --git a/include/boost/asio/ip/tcp.hpp b/include/boost/asio/ip/tcp.hpp
index c496b4b9c5..2e30029da6 100644
--- a/include/boost/asio/ip/tcp.hpp
+++ b/include/boost/asio/ip/tcp.hpp
@@ -46,6 +46,7 @@ namespace ip {
 class tcp
 {
 public:
+  tcp() {}
   /// The type of a TCP endpoint.
   typedef basic_endpoint<tcp> endpoint;