diff --git a/lib/faye_ttl.rb b/lib/faye_ttl.rb
index eede05c67..2c876028a 100644
--- a/lib/faye_ttl.rb
+++ b/lib/faye_ttl.rb
@@ -31,6 +31,7 @@ def outgoing(message, callback)
       if subscription.start_with?(*channels)
         messages = history[subscription]
         unless messages.empty?
+          # TODO move this into the incoming message handler
           messages = messages.delete_if do |m|
             (Time.now.to_i - m['timestamp']) > ttl
           end