diff --git a/lib/galaxy/exceptions/__init__.py b/lib/galaxy/exceptions/__init__.py
index d167a2e1fd00..8deab77bc17b 100644
--- a/lib/galaxy/exceptions/__init__.py
+++ b/lib/galaxy/exceptions/__init__.py
@@ -16,6 +16,8 @@
 and messages.
 """
 
+from typing import Optional
+
 from .error_codes import (
     error_codes_by_name,
     ErrorCode,