diff --git a/collects/typed/rackunit.rkt b/collects/typed/rackunit.rkt
index 54e18f1f..6b9d16d1 100644
--- a/collects/typed/rackunit.rkt
+++ b/collects/typed/rackunit.rkt
@@ -1,3 +1,3 @@
-#lang racket
+#lang racket/base
 (require typed/rackunit/main)
 (provide (all-from-out typed/rackunit/main))