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-rw-r--r--lisp/emacs-lisp/cl-macs.el2
1 files changed, 1 insertions, 1 deletions
diff --git a/lisp/emacs-lisp/cl-macs.el b/lisp/emacs-lisp/cl-macs.el
index b50961adac9..011965acb54 100644
--- a/lisp/emacs-lisp/cl-macs.el
+++ b/lisp/emacs-lisp/cl-macs.el
@@ -498,7 +498,7 @@ its argument list allows full Common Lisp conventions."
;; `&aux' args aren't arguments, so let's just drop them from the
;; usage info.
(setq arglist (cl-subseq arglist 0 aux))))
- (if (cdr-safe (last arglist)) ;Not a proper list.
+ (if (not (proper-list-p arglist))
(let* ((last (last arglist))
(tail (cdr last)))
(unwind-protect