--- widelands-build17-src/src/main.cc.orig	2013-07-15 13:22:34.201117347 +0200
+++ widelands-build17-src/src/main.cc	2013-07-15 13:22:48.369970197 +0200
@@ -28,6 +28,7 @@
 #include <iostream>
 #include <stdexcept>
 #include <typeinfo>
+#include <unistd.h>
 
 #include <SDL_main.h>