diff --git a/src/irc.coffee b/src/irc.coffee
index 47b94c1..b6ffec5 100644
--- a/src/irc.coffee
+++ b/src/irc.coffee
@@ -220,6 +220,8 @@ class IrcBot extends Adapter
         self.createUser channel, nick
 
     bot.addListener 'notice', (from, to, message) ->
+      return unless from
+
       if from in options.ignoreUsers
         logger.info('Ignoring user: %s', from)
         # we'll ignore this message if it's from someone we want to ignore