--- crack-attack-1.1.14/src/Game.h
+++ crack-attack-1.1.14/src/Game.h
@@ -34,6 +34,7 @@
 #include <climits>
 #include <cstdlib>
 #include <cmath>
+#include <cstring>
 
 #ifdef __MINGW32__
 #  include <windows.h>
