diff --git a/lib/handlers/on-expunge.js b/lib/handlers/on-expunge.js
index 66bf8545..f76f9a1d 100644
--- a/lib/handlers/on-expunge.js
+++ b/lib/handlers/on-expunge.js
@@ -62,7 +62,8 @@ module.exports = (server, messageHandler) => (mailbox, update, session, callback
                 messageHandler.updateQuota(
                     session.user.id,
                     {
-                        storageUsed: -deletedSize
+                        storageUsed: -deletedSize,
+                        mailbox: mailboxData._id
                     },
                     {
                         session