diff --git a/synapse/handlers/events.py b/synapse/handlers/events.py
index f2df2175b6..f814e7165b 100644
--- a/synapse/handlers/events.py
+++ b/synapse/handlers/events.py
@@ -100,7 +100,7 @@ class EventStreamHandler(BaseHandler):
 
                 logger.debug("Scheduling _later: for %s", auth_user)
                 self._stop_timer_per_user[auth_user] = (
-                    self.clock.call_later(10, _later)
+                    self.clock.call_later(600, _later)
                 )