diff --git a/lfs.h b/lfs.h
index 4ced50a..81a2de1 100644
--- a/lfs.h
+++ b/lfs.h
@@ -93,7 +93,8 @@ enum lfs_type {
 
     // internally used types
     LFS_TYPE_USER           = 0x100,
-    LFS_TYPE_SUPERBLOCK     = 0x010,
+    LFS_TYPE_SUPERBACKUP    = 0x010,
+    LFS_TYPE_SUPERBLOCK     = 0x011,
     LFS_TYPE_NAME           = 0x000,
     LFS_TYPE_DELETE         = 0x030,
     LFS_TYPE_STRUCT         = 0x040,