diff --git a/source/fs/mufs/tree.c b/source/fs/mufs/tree.c
index 0c1a0bb..f100b05 100644
--- a/source/fs/mufs/tree.c
+++ b/source/fs/mufs/tree.c
@@ -113,6 +113,8 @@ int mufs_extend_tree(struct mufs *fs, struct mufs_tree *tree, uint8_t depth)
 			mufs_free_block(fs, root);
 			return -1;
 		}
+
+		tree->root = root;
 	}
 
 	return 0;