diff -uNr celeron55-minetest-bc0e5c0/src/filesys.cpp minetest-gcc/src/filesys.cpp
--- celeron55-minetest-bc0e5c0/src/filesys.cpp	2011-11-09 11:07:40.000000000 +0100
+++ minetest-gcc/src/filesys.cpp	2012-01-14 17:33:28.620318340 +0100
@@ -21,6 +21,7 @@
 #include "strfnd.h"
 #include <iostream>
 #include <string.h>
+#include <unistd.h>
 
 namespace fs
 {