diff --git a/cheuph/tree_list.py b/cheuph/tree_list.py
index 0c501cb..e7fcee3 100644
--- a/cheuph/tree_list.py
+++ b/cheuph/tree_list.py
@@ -96,6 +96,8 @@ class TreeList:
         # below that.
         self._lower_offset = offset - 1
 
+        self._deque.extend(tree)
+
     def add_above(self, tree: List[RenderedElement]) -> None:
         """
         Add a rendered tree above all current trees.