diff --git a/src/network_asio.hpp b/src/network_asio.hpp
index 3be8bfb9f04b2..6686e357ddff7 100644
--- a/src/network_asio.hpp
+++ b/src/network_asio.hpp
@@ -16,7 +16,9 @@
 
 #ifdef _WIN32
 
+#if _WIN32_WINNT == _WIN32_WINNT_WINXP
 #define BOOST_ASIO_DISABLE_IOCP
+#endif
 
 #ifdef INADDR_ANY
 #undef INADDR_ANY
diff --git a/src/wesnothd_connection.hpp b/src/wesnothd_connection.hpp
index b42aba6472ae5..bddd5720a45b9 100644
--- a/src/wesnothd_connection.hpp
+++ b/src/wesnothd_connection.hpp
@@ -20,7 +20,9 @@
 // gethostbyname in socket_ops.ipp. This define silences that.
 #define _WINSOCK_DEPRECATED_NO_WARNINGS
 
+#if _WIN32_WINNT == _WIN32_WINNT_WINXP
 #define BOOST_ASIO_DISABLE_IOCP
+#endif
 
 #ifdef INADDR_ANY
 #undef INADDR_ANY