diff --git a/collects/frtime/lang-ext.rkt b/collects/frtime/lang-ext.rkt
index 53d4520d95..b7b4580fa9 100644
--- a/collects/frtime/lang-ext.rkt
+++ b/collects/frtime/lang-ext.rkt
@@ -1,4 +1,4 @@
-#lang scheme/base
+#lang racket/base
 (require frtime/core/frp
          scheme/bool
          scheme/list