diff --git a/pkgs/typed-racket-pkgs/typed-racket-lib/typed-racket/base-env/base-env.rkt b/pkgs/typed-racket-pkgs/typed-racket-lib/typed-racket/base-env/base-env.rkt
index cae6917904..2e4f262269 100644
--- a/pkgs/typed-racket-pkgs/typed-racket-lib/typed-racket/base-env/base-env.rkt
+++ b/pkgs/typed-racket-pkgs/typed-racket-lib/typed-racket/base-env/base-env.rkt
@@ -923,6 +923,8 @@
 [hash-eqv? (-> -HashTop B)]
 [hash-equal? (-> -HashTop B)]
 [hash-weak? (-> -HashTop B)]
+;; not a very useful type, but better than nothing
+[hash (-poly (a b) (-> (-HT a b)))]
 [make-hash (-poly (a b) (->opt [(-lst (-pair a b))] (-HT a b)))]
 [make-hasheq (-poly (a b) (->opt [(-lst (-pair a b))] (-HT a b)))]
 [make-hasheqv (-poly (a b) (->opt [(-lst (-pair a b))] (-HT a b)))]