[PATCH] fio.h is missing unistd.h include
diff --git a/fio.h b/fio.h
index 66b70ef..1bc72a6 100644
--- a/fio.h
+++ b/fio.h
@@ -9,6 +9,7 @@
 #include <errno.h>
 #include <stdlib.h>
 #include <stdio.h>
+#include <unistd.h>
 
 #include "list.h"
 #include "md5.h"