diff --git a/synapse/push/pusherpool.py b/synapse/push/pusherpool.py
index ba513601e7..aa095f9d9b 100644
--- a/synapse/push/pusherpool.py
+++ b/synapse/push/pusherpool.py
@@ -32,7 +32,6 @@ class PusherPool:
         self.store = self.hs.get_datastore()
         self.clock = self.hs.get_clock()
         self.pushers = {}
-        self.last_pusher_started = -1
 
     @defer.inlineCallbacks
     def start(self):