diff --git a/pkgs/racket-doc/scribblings/reference/struct.scrbl b/pkgs/racket-doc/scribblings/reference/struct.scrbl
index 806703c1ba..ac5fe749e0 100644
--- a/pkgs/racket-doc/scribblings/reference/struct.scrbl
+++ b/pkgs/racket-doc/scribblings/reference/struct.scrbl
@@ -135,7 +135,8 @@ The @racket[inspector] argument normally controls access to reflective
 information about the structure type and its instances; see
 @secref["inspectors"] for more information. If @racket[inspector] is
 @racket['prefab], then the resulting @tech{prefab} structure type and
-its instances are always transparent.
+its instances are always transparent. If @racket[inspector] is
+@racket[#f], then the structure type's instances are transparent.
 
 If @racket[proc-spec] is an integer or procedure, instances of the
 structure type act as procedures. See @racket[prop:procedure] for