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-rw-r--r--lisp/mail/rmailsum.el1
1 files changed, 1 insertions, 0 deletions
diff --git a/lisp/mail/rmailsum.el b/lisp/mail/rmailsum.el
index 57e837c7216..b0208a102c0 100644
--- a/lisp/mail/rmailsum.el
+++ b/lisp/mail/rmailsum.el
@@ -872,6 +872,7 @@ Commands for sorting the summary:
'("Next" . rmail-summary-next-all))
(defvar rmail-summary-overlay nil)
+(put 'rmail-summary-overlay 'permanent-local t)
(defun rmail-summary-goto-msg (&optional n nowarn skip-rmail)
(interactive "P")