--- src/Ncurses_UI.cc.old	2012-07-21 22:25:16.421521521 +0200
+++ src/Ncurses_UI.cc	2012-07-21 22:26:01.008390914 +0200
@@ -23,6 +23,8 @@
 /* includes */
 #include "Ncurses_UI.hh"
 
+#include <unistd.h>
+
 using namespace ngstar2;
 
 Ncurses_UI::Ncurses_UI( NGStar2 *engine, Configuration* config, Scores *scores )