From 955ef1f06caee7385cb5ef21477b4d0490889c3c Mon Sep 17 00:00:00 2001
From: Mark Haines <mark.haines@matrix.org>
Date: Mon, 25 Jul 2016 16:04:45 +0100
Subject: [PATCH] fix: defer.returnValue takes one argument

---
 synapse/storage/background_updates.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/synapse/storage/background_updates.py b/synapse/storage/background_updates.py
index af9bfbbe472d..30d0e4c5dc50 100644
--- a/synapse/storage/background_updates.py
+++ b/synapse/storage/background_updates.py
@@ -115,7 +115,7 @@ def start_doing_background_updates(self):
                         "No more background updates to do."
                         " Unscheduling background update task."
                     )
-                    defer.returnValue()
+                    defer.returnValue(None)
 
     @defer.inlineCallbacks
     def do_next_background_update(self, desired_duration_ms):