diff --git a/comparator.py b/comparator.py
index c1d7843..7f70022 100644
--- a/comparator.py
+++ b/comparator.py
@@ -19,8 +19,8 @@ def nodes_eq(
     return (
         left_node.value == right_node.value
         and (not same or left_node.rank == right_node.rank)
-        and nodes_eq(left_node.left, right_node.left)
-        and nodes_eq(left_node.right, right_node.right)
+        and nodes_eq(left_node.left, right_node.left, same)
+        and nodes_eq(left_node.right, right_node.right, same)
     )