diff --git a/src/structures/ThreadChannel.js b/src/structures/ThreadChannel.js
index 27a0c81..f5ab085 100644
--- a/src/structures/ThreadChannel.js
+++ b/src/structures/ThreadChannel.js
@@ -107,7 +107,9 @@ class ThreadChannel extends Channel {
        * created</info>
        * @type {?number}
        */
-      this.archiveTimestamp = new Date(data.thread_metadata.archive_timestamp).getTime();
+      this.archiveTimestamp = data.thread_metadata?.archive_timestamp
+        ? Date.parse(data.thread_metadata.archive_timestamp)
+        : null;
 
       if ('create_timestamp' in data.thread_metadata) {
         // Note: this is needed because we can't assign directly to getters