diff --git a/lib/handlers/on-status.js b/lib/handlers/on-status.js
index ea35e286..5890ff30 100644
--- a/lib/handlers/on-status.js
+++ b/lib/handlers/on-status.js
@@ -58,7 +58,8 @@ module.exports = server => (path, session, callback) => {
                                 messages: total,
                                 uidNext: mailboxData.uidNext,
                                 uidValidity: mailboxData.uidValidity,
-                                unseen
+                                unseen,
+                                highestModseq: Number(mailboxData.modifyIndex) || 0
                             });
                         }
                     );