diff --git a/collects/typed-scheme/scribblings/ts-reference.scrbl b/collects/typed-scheme/scribblings/ts-reference.scrbl
index 710f0c70..48bcd6dc 100644
--- a/collects/typed-scheme/scribblings/ts-reference.scrbl
+++ b/collects/typed-scheme/scribblings/ts-reference.scrbl
@@ -79,6 +79,7 @@ default in Racket.
 @defidform[Input-Port]
 @defidform[Output-Port]
 @defidform[Path]
+@defidform[Path-String]
 @defidform[Regexp]
 @defidform[PRegexp]
 @defidform[Bytes]