(describe-function): Handle the arglist of a macro.

1 files changed, 7 insertions, 4 deletions

diff --git a/lisp/help.el b/lisp/help.el
index 8fdcc7c8d48..3911a166da8 100644
--- a/lisp/help.el
+++ b/lisp/help.el
@@ -565,10 +565,13 @@ C-w Display information on absence of warranty for GNU Emacs."
                 (princ "'")))
           (princ ".")
           (terpri)
-          (let ((arglist (cond ((byte-code-function-p def)
-                                (car (append def nil)))
-                               ((eq (car-safe def) 'lambda)
-                                (nth 1 def))
+          (let* ((inner-function (if (and (listp def) 'macro)
+                                     (cdr def)
+                                   def))
+                 (arglist (cond ((byte-code-function-p inner-function)
+                                (car (append inner-function nil)))
+                               ((eq (car-safe inner-function) 'lambda)
+                                (nth 1 inner-function))
                                (t t))))
             (if (listp arglist)
                 (progn