diff --git a/pkgs/scribble-pkgs/scribble-lib/scribble/render.rkt b/pkgs/scribble-pkgs/scribble-lib/scribble/render.rkt
index 0d802f28..4da1a81f 100644
--- a/pkgs/scribble-pkgs/scribble-lib/scribble/render.rkt
+++ b/pkgs/scribble-pkgs/scribble-lib/scribble/render.rkt
@@ -25,7 +25,8 @@
            #:xrefs (listof xref?)
            #:info-in-files (listof path-string?)
            #:info-out-file (or/c #f path-string?)
-           #:quiet? any/c)
+           #:quiet? any/c
+           #:warn-undefined? any/c)
           . ->* . void?)])
 
 (define (render docs