diff --git a/plugins/discourse-narrative-bot/lib/discourse_narrative_bot/track_selector.rb b/plugins/discourse-narrative-bot/lib/discourse_narrative_bot/track_selector.rb
index 2888489f020..7aa7449ff06 100644
--- a/plugins/discourse-narrative-bot/lib/discourse_narrative_bot/track_selector.rb
+++ b/plugins/discourse-narrative-bot/lib/discourse_narrative_bot/track_selector.rb
@@ -245,7 +245,7 @@ module DiscourseNarrativeBot
 
     def bot_mentioned?
       @bot_mentioned ||= PostAnalyzer.new(@post.raw, @post.topic_id).raw_mentions.include?(
-        self.discobot_user.username.downcase
+        self.discobot_user.username_lower
       )
     end