diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index a4cb4b642987..8b9f9d6aa51e 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -2299,7 +2299,7 @@ int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
 						goto done;
 					}
 				} else {
-					btrfs_tree_read_lock(b);
+					__btrfs_tree_read_lock(b, BTRFS_EXTENT_TREE_OBJECTID);
 				}
 				p->locks[level] = BTRFS_READ_LOCK;
 			}