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-rw-r--r--lisp/mail/rmail.el1
1 files changed, 1 insertions, 0 deletions
diff --git a/lisp/mail/rmail.el b/lisp/mail/rmail.el
index 3aa0391eef0..fcda6eb0ec5 100644
--- a/lisp/mail/rmail.el
+++ b/lisp/mail/rmail.el
@@ -720,6 +720,7 @@ argument causes us to read a file name and use that file as the inbox."
(message "%d new message%s read"
new-messages (if (= 1 new-messages) "" "s"))
(and (boundp 'display-time-string)
+ (stringp display-time-string)
(string-match " Mail" display-time-string)
(setq display-time-string
(concat