Index: lib/ext2fs/ext2fs.h
===================================================================
--- lib/ext2fs/ext2fs.h.orig
+++ lib/ext2fs/ext2fs.h
@@ -62,6 +62,7 @@ extern "C" {
 #include <string.h>
 #include <time.h>
 #include <errno.h>
+#include <unistd.h>
 
 #if EXT2_FLAT_INCLUDES
 #include "e2_types.h"