diff --git a/collects/frtime/struct.rkt b/collects/frtime/struct.rkt
index fa5a442672..630325e8a4 100644
--- a/collects/frtime/struct.rkt
+++ b/collects/frtime/struct.rkt
@@ -1,4 +1,4 @@
-#lang scheme/base
+#lang racket/base
 (require scheme/struct-info
          (for-syntax scheme/base)
          (for-template scheme/base))