1 files changed, 9 insertions, 2 deletions

diff --git a/lisp/gnus/nnimap.el b/lisp/gnus/nnimap.el
index 6f2ebfb7fe6..363e4186cbc 100644
--- a/lisp/gnus/nnimap.el
+++ b/lisp/gnus/nnimap.el
@@ -1163,6 +1163,12 @@ If LIMIT, first try to limit the search to the N last articles."
         ;; response.  If they're successful, they're successful.
         (dolist (action actions)
           (cl-destructuring-bind (range action marks) action
+            ;; If we add/remove a tick mark, then do the same with the
+            ;; readedness mark on the IMAP server.  Other IMAP clients
+            ;; can have marked messages without having them read, but
+            ;; Gnus can't.
+            (when (memq 'tick marks)
+              (push 'read marks))
             (let ((flags (nnimap-marks-to-flags marks)))
               (when flags
                 (setq sequence (nnimap-send-command
@@ -1492,8 +1498,9 @@ If LIMIT, first try to limit the search to the N last articles."
 
 (defun nnimap-update-info (info marks)
   (cl-destructuring-bind (existing flags high low uidnext start-article
-                                permanent-flags uidvalidity
-                                vanished highestmodseq) marks
+                                   permanent-flags uidvalidity
+                                   vanished highestmodseq)
+      marks
     (cond
      ;; Ignore groups with no UIDNEXT/marks.  This happens for
      ;; completely empty groups.