1 files changed, 1 insertions, 0 deletions
diff --git a/ctree.h b/ctree.h
index 8fed41e3..00810f35 100644
--- a/ctree.h
+++ b/ctree.h
@@ -12,6 +12,7 @@ struct btrfs_trans_handle;
 #define BTRFS_EXTENT_TREE_OBJECTID 2
 #define BTRFS_INODE_MAP_OBJECTID 3
 #define BTRFS_FS_TREE_OBJECTID 4
+#define BTRFS_FIRST_FREE_OBJECTID 5
 
 /*
  * the key defines the order in the tree, and so it also defines (optimal)