diff --git a/lisp/emacs-lisp/shortdoc-doc.el b/lisp/emacs-lisp/shortdoc-doc.el
index eb642c1600b..9b1f00df127 100644
--- a/lisp/emacs-lisp/shortdoc-doc.el
+++ b/lisp/emacs-lisp/shortdoc-doc.el
@@ -998,6 +998,7 @@
    :eval (seq-some #'floatp '(1 2.0 3)))
   "Building Sequences"
   (seq-concatenate
+   :args (type &rest sequences)
    :eval (seq-concatenate 'vector '(1 2) '(c d)))
   (seq-copy
    :eval (seq-copy '(a 2)))