diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 0eebd0bd6bc0..cad06c60ad66 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -1422,7 +1422,9 @@ get_old_root(struct btrfs_root *root, u64 time_seq)
 			btrfs_warn(root->fs_info,
 				"failed to read tree block %llu from get_old_root", logical);
 		} else {
+			btrfs_tree_read_lock(old);
 			eb = btrfs_clone_extent_buffer(old);
+			btrfs_tree_read_unlock(old);
 			free_extent_buffer(old);
 		}
 	} else if (old_root) {