diff --git a/game/main.cpp b/game/main.cpp
index 2718363..924fcd0 100644
--- a/game/main.cpp
+++ b/game/main.cpp
@@ -1,3 +1,5 @@
+#define ASIO_STANDALONE
+
 #include <iostream>
 #include <getopt.h>
 #include <asio.hpp>
diff --git a/game/session.cpp b/game/session.cpp
index 261140b..ef62b5a 100644
--- a/game/session.cpp
+++ b/game/session.cpp
@@ -1,3 +1,5 @@
+#define ASIO_STANDALONE
+
 #include "session.hpp"
 #include "game.hpp"
 #include "state/commands.hpp"