diff --git a/examples/echo_client.py b/examples/echo_client.py
index e021920..fa2be87 100644
--- a/examples/echo_client.py
+++ b/examples/echo_client.py
@@ -166,6 +166,7 @@ class EchoBot(ClientXMPP):
                 # untrusted/undecided barejid, so we need to make a decision here.
                 # This is where you prompt your user to ask what to do.
                 self['xep_0384'].trust(exn.bare_jid, exn.device, exn.ik)
+            # TODO: catch NoEligibleDevicesException and MissingBundleException
             except Exception as exn:
                 await self.plain_reply(
                     original_msg,