diff --git a/app.js b/app.js
index 61830ed..950b076 100644
--- a/app.js
+++ b/app.js
@@ -300,6 +300,7 @@ function sendMessage(e) {
     name: config.userName,
     message,
     avatar: config.userAvatar,
+    topic: b4a.toString(currentRoom.topic, 'hex'),
     timestamp: Date.now(),
   });