diff --git a/synapse/app/homeserver.py b/synapse/app/homeserver.py
index 800b9c0e3..005921dcf 100755
--- a/synapse/app/homeserver.py
+++ b/synapse/app/homeserver.py
@@ -525,7 +525,7 @@ def run(hs):
     clock.looping_call(
         hs.get_datastore().reap_monthly_active_users, 1000 * 60 * 60
     )
-    yield hs.get_datastore().reap_monthly_active_users()
+    hs.get_datastore().reap_monthly_active_users()
 
     @defer.inlineCallbacks
     def generate_monthly_active_users():