1 files changed, 1 insertions, 0 deletions

diff --git a/lisp/mail/rmail.el b/lisp/mail/rmail.el
index 19f32efc136..8930cc3bce9 100644
--- a/lisp/mail/rmail.el
+++ b/lisp/mail/rmail.el
@@ -581,6 +581,7 @@ by substituting the new message number into the existing list.")
 
 (defvar rmail-buffer-swapped nil
   "If non-nil, `rmail-buffer' is swapped with `rmail-view-buffer'.")
+(make-variable-buffer-local 'rmail-buffer-swapped)
 (put 'rmail-buffer-swapped 'permanent-local t)
 
 (defvar rmail-view-buffer nil