--- src/stratagus/iolib.cpp.orig	2022-07-31 09:44:18 UTC
+++ src/stratagus/iolib.cpp
@@ -47,6 +47,7 @@
 #include "SDL.h"
 
 #include <map>
+#include <unordered_map>
 #include <stdarg.h>
 #include <stdio.h>