diff --git a/synapse/handlers/sync.py b/synapse/handlers/sync.py
index feea407ea254..9796f2a57f0e 100644
--- a/synapse/handlers/sync.py
+++ b/synapse/handlers/sync.py
@@ -115,7 +115,7 @@ def __nonzero__(self):
         events.
         """
         return bool(
-            self.presence or self.joined or self.invited
+            self.presence or self.joined or self.invited or self.archived
         )
 
 GuestRoom = collections.namedtuple("GuestRoom", ("room_id", "membership"))