diff --git a/core/thread.py b/core/thread.py
index 646c98a604..81dc03f44d 100644
--- a/core/thread.py
+++ b/core/thread.py
@@ -250,7 +250,7 @@ async def send_persistent_notes():
             ids = {}
 
             class State:
-                def store_user(self, user):
+                def store_user(self, user, cache):
                     return user
 
             for note in notes: