diff --git a/collects/typed-racket/base-env/base-env.rkt b/collects/typed-racket/base-env/base-env.rkt
index 42efb05ade..8c4d4a2ead 100644
--- a/collects/typed-racket/base-env/base-env.rkt
+++ b/collects/typed-racket/base-env/base-env.rkt
@@ -2473,3 +2473,6 @@
 [will-register (-poly (a) (-> -Will-Executor a (-> a ManyUniv) -Void))]
 [will-execute (-> -Will-Executor ManyUniv)]
 [will-try-execute (-> -Will-Executor ManyUniv)]
+
+;; reader graphs
+[make-reader-graph (-> Univ Univ)]
\ No newline at end of file