diff --git a/fs/ntfs/mft.h b/fs/ntfs/mft.h
index 639cd1b..b52bf87 100644
--- a/fs/ntfs/mft.h
+++ b/fs/ntfs/mft.h
@@ -111,7 +111,7 @@
 	return err;
 }
 
-extern BOOL ntfs_may_write_mft_record(ntfs_volume *vol,
+extern bool ntfs_may_write_mft_record(ntfs_volume *vol,
 		const unsigned long mft_no, const MFT_RECORD *m,
 		ntfs_inode **locked_ni);