diff --git a/packages/client/src/types/messages/message.ts b/packages/client/src/types/messages/message.ts
index 071fec8e..13c3d0d8 100644
--- a/packages/client/src/types/messages/message.ts
+++ b/packages/client/src/types/messages/message.ts
@@ -348,6 +348,14 @@ export class Message {
         return this.raw.replyTo?.replyToMsgId ?? null
     }
 
+    /**
+     * For replies, ID of the thread (i.e. ID of the top message
+     * in the thread)
+     */
+    get replyToThreadId(): number | null {
+        return this.raw.replyTo?.replyToTopId ?? null
+    }
+
     /**
      * Whether this message contains mention of the current user
      */