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-rw-r--r--lisp/emacs-lisp/easy-mmode.el2
1 files changed, 1 insertions, 1 deletions
diff --git a/lisp/emacs-lisp/easy-mmode.el b/lisp/emacs-lisp/easy-mmode.el
index b667d39ea17..bc97b07ddc3 100644
--- a/lisp/emacs-lisp/easy-mmode.el
+++ b/lisp/emacs-lisp/easy-mmode.el
@@ -158,7 +158,7 @@ For example, you could write
(setq body (cdr body))
(case keyw
(:init-value (setq init-value (pop body)))
- (:lighter (setq lighter (pop body)))
+ (:lighter (setq lighter (purecopy (pop body))))
(:global (setq globalp (pop body)))
(:extra-args (setq extra-args (pop body)))
(:set (setq set (list :set (pop body))))