diff --git a/development/development/upgrade/400.rst b/development/development/upgrade/400.rst
index f6084521..9bcad8fb 100644
--- a/development/development/upgrade/400.rst
+++ b/development/development/upgrade/400.rst
@@ -139,6 +139,12 @@ Also have a look at the `phpBB API documentation <https://area51.phpbb.com/docs/
      - ``4.0.0-a1``
      - Use ``\bantu\IniGetWrapper\IniGetWrapper`` instead.
 
+   * - ``bbcode_second_pass_by_extension``
+     - ``includes/bbcode.php``
+     - Removed in ``4.0.0-a1``, deprecated in ``3.2.10``
+     - ``4.0.0-a1``
+     - Use s9e text_formatter instead.
+
    * - ``get_user_avatar``
      - ``includes/functions_compatibility.php``
      - Removed in ``4.0.0-a1``, deprecated in ``3.1.0-a1``