--- src/server/MatchMaker.h.orig	2018-04-08 17:00:10.190980191 +0100
+++ src/server/MatchMaker.h	2018-04-08 17:00:21.485943269 +0100
@@ -22,6 +22,7 @@
 
 #include "raknet/NetworkTypes.h"
 #include <map>
+#include <vector>
 #include <functional>
 #include "Global.h"