Index: brutalchess-0.5.2/src/faileplayer.cpp
===================================================================
--- brutalchess-0.5.2/src/faileplayer.cpp	2006-12-20 21:19:50.000000000 +0100
+++ brutalchess-0.5.2/src/faileplayer.cpp	2012-11-29 21:32:32.000000000 +0000
@@ -15,6 +15,8 @@
 #include <sstream>
 #include <string>
 
+#include <unistd.h>
+
 using namespace std;
 
 FailePlayer::FailePlayer()
Index: brutalchess-0.5.2/src/xboardplayer.cpp
===================================================================
--- brutalchess-0.5.2/src/xboardplayer.cpp	2006-12-19 05:00:01.000000000 +0100
+++ brutalchess-0.5.2/src/xboardplayer.cpp	2012-11-29 22:33:30.000000000 +0000
@@ -15,6 +15,8 @@
 #include <sstream>
 #include <string>
 
+#include <unistd.h>
+
 using namespace std;