diff --git a/docs/developer_guide/adding_typehints.md b/docs/developer_guide/adding_typehints.md
index 7c034f5b58..fb26b1f54b 100644
--- a/docs/developer_guide/adding_typehints.md
+++ b/docs/developer_guide/adding_typehints.md
@@ -32,6 +32,8 @@ When working with models that have soft dependencies, additional considerations
 
 
  ```python
+from __future__ import annotations
+
 from aeon.anomaly_detection.base import BaseAnomalyDetector
 from aeon.utils.validation._dependencies import _check_soft_dependencies
 from typing import TYPE_CHECKING, Any