diff --git a/capsulflask/spoke_api.py b/capsulflask/spoke_api.py
index f07c541..b73f2f7 100644
--- a/capsulflask/spoke_api.py
+++ b/capsulflask/spoke_api.py
@@ -41,7 +41,7 @@ def operation_with_id(operation_id: int):
 def operation_without_id():
   return operation_impl(None)
 
-def operation_impl(operation_id: int|None):
+def operation_impl(operation_id: int):
   if authorized_as_hub(request.headers):
     request_body_json = request.json
     request_body = json.loads(request_body_json)