diff --git a/Global.h b/Global.h
index 5d79c834e..6005dd82d 100644
--- a/Global.h
+++ b/Global.h
@@ -172,6 +172,9 @@ static_assert(sizeof(bool) == 1, "Bool needs to be 1 byte in size.");
 #if defined(_MSC_VER) && (_MSC_VER == 1900 || _MSC_VER == 1910 || _MSC_VER == 1911)
 #define BOOST_NO_CXX11_VARIADIC_TEMPLATES //Variadic templates are buggy in VS2015 and VS2017, so turn this off to avoid compile errors
 #endif
+#if BOOST_VERSION >= 106600
+#define BOOST_ASIO_ENABLE_OLD_SERVICES
+#endif
 
 #include <boost/algorithm/string.hpp>
 #include <boost/any.hpp>
diff --git a/lib/serializer/Connection.cpp b/lib/serializer/Connection.cpp
index 608660e08..9a79b70c5 100644
--- a/lib/serializer/Connection.cpp
+++ b/lib/serializer/Connection.cpp
@@ -14,9 +14,6 @@
 #include "../mapping/CMap.h"
 #include "../CGameState.h"
 
-#if BOOST_VERSION >= 106600
-#define BOOST_ASIO_ENABLE_OLD_SERVICES
-#endif
 #include <boost/asio.hpp>
 
 using namespace boost;
diff --git a/server/CVCMIServer.cpp b/server/CVCMIServer.cpp
index b0788f228..bd019c839 100644
--- a/server/CVCMIServer.cpp
+++ b/server/CVCMIServer.cpp
@@ -9,9 +9,6 @@
  */
 #include "StdInc.h"
 
-#if BOOST_VERSION >= 106600
-#define BOOST_ASIO_ENABLE_OLD_SERVICES
-#endif
 #include <boost/asio.hpp>
 
 #include "../lib/filesystem/Filesystem.h"