diff --git a/opensquirrel/utils/check_passes/check_mapper.py b/opensquirrel/utils/check_passes/check_mapper.py
index 55f0462e..56265db7 100644
--- a/opensquirrel/utils/check_passes/check_mapper.py
+++ b/opensquirrel/utils/check_passes/check_mapper.py
@@ -1,5 +1,7 @@
 """This module contains checks for the ``Mapper`` pass."""
 
+from __future__ import annotations
+
 from copy import deepcopy
 
 from opensquirrel.mapper.general_mapper import Mapper