diff -r 9fc957e63f8d tools/fs-back/fs-backend.c
--- a/tools/fs-back/fs-backend.c	Tue Mar 17 15:40:25 2009 +0000
+++ b/tools/fs-back/fs-backend.c	Wed Mar 18 07:21:47 2009 -0400
@@ -1,4 +1,5 @@
 #undef NDEBUG
+#include <unistd.h>
 #include <stdio.h>
 #include <string.h>
 #include <assert.h>