diff --git a/pkgs/racket-doc/scribblings/reference/bytes.scrbl b/pkgs/racket-doc/scribblings/reference/bytes.scrbl
index b57634c94b..7681dab70b 100644
--- a/pkgs/racket-doc/scribblings/reference/bytes.scrbl
+++ b/pkgs/racket-doc/scribblings/reference/bytes.scrbl
@@ -382,7 +382,7 @@ For communication among @tech{places}, the new byte string is allocated in the
 ]}
 
 @defproc[(bytes-utf-8-index [bstr bytes?]
-                            [skip exact-nonnegative-integer? 0]
+                            [skip exact-nonnegative-integer?]
                             [err-char (or/c #f char?) #f]
                             [start exact-nonnegative-integer? 0]
                             [end exact-nonnegative-integer? (bytes-length bstr)])