--- Source/Game.hpp.orig	2020-05-23 00:03:09 UTC
+++ Source/Game.hpp
@@ -42,6 +42,7 @@ along with Lugaru.  If not, see <http://www.gnu.org/li
 
 #include <SDL.h>
 #include <fstream>
+#include <unistd.h>
 
 #define NB_CAMPAIGN_MENU_ITEM 7
 
