diff --git a/imap/imap.c b/imap/imap.c
index 7a7fe93a87e..5a5aaee478a 100644
--- a/imap/imap.c
+++ b/imap/imap.c
@@ -1077,6 +1077,8 @@ enum MxStatus imap_check_mailbox(struct Mailbox *m, bool force)
 
   mdata->check_status = IMAP_OPEN_NO_FLAGS;
 
+  if (force)
+    mx_mbox_reset_check();
   return check;
 }