diff --git a/src/core/ChatMessageBuffer.js b/src/core/ChatMessageBuffer.js
index 10bab02..19317aa 100644
--- a/src/core/ChatMessageBuffer.js
+++ b/src/core/ChatMessageBuffer.js
@@ -79,6 +79,7 @@ class ChatMessageBuffer {
         message,
         flag,
         uid,
+        Math.round(Date.now() / 1000),
       ]);
     }
   }