1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/push/emailpusher.py b/synapse/push/emailpusher.py
index c7afd11111..b3e0098a86 100644
--- a/synapse/push/emailpusher.py
+++ b/synapse/push/emailpusher.py
@@ -219,7 +219,7 @@ class EmailPusher(object):
 
     def seconds_until(self, ts_msec):
         secs = (ts_msec - self.clock.time_msec()) / 1000
-        return max(secs, 0)
+        return max(secs, 0)  # Ensure non-negative
 
     def get_room_throttle_ms(self, room_id):
         if room_id in self.throttle_params: