diff --git a/pkgs/racket-doc/scribblings/reference/procedures.scrbl b/pkgs/racket-doc/scribblings/reference/procedures.scrbl
index 87f5d93da1..9815a5a6e2 100644
--- a/pkgs/racket-doc/scribblings/reference/procedures.scrbl
+++ b/pkgs/racket-doc/scribblings/reference/procedures.scrbl
@@ -708,7 +708,6 @@ and @racket[(equal? (normalize-arity a) (normalize-arity b))].
 (arity=? 1 (list 1))
 (arity=? 1 (arity-at-least 1))
 (arity=? (arity-at-least 1) 1)
-(arity=? 1 (arity-at-least 1))
 (arity=? (arity-at-least 1) (list 1 (arity-at-least 2)))
 (arity=? (list 1 (arity-at-least 2)) (arity-at-least 1))
 (arity=? (arity-at-least 1) (list 1 (arity-at-least 3)))
@@ -732,7 +731,6 @@ arguments that procedures with arity @racket[b] accept.
 (arity-includes? 1 (list 1))
 (arity-includes? 1 (arity-at-least 1))
 (arity-includes? (arity-at-least 1) 1)
-(arity-includes? 1 (arity-at-least 1))
 (arity-includes? (arity-at-least 1) (list 1 (arity-at-least 2)))
 (arity-includes? (list 1 (arity-at-least 2)) (arity-at-least 1))
 (arity-includes? (arity-at-least 1) (list 1 (arity-at-least 3)))