diff --git a/collects/racket/flonum.rkt b/collects/racket/flonum.rkt
index d7d4e23a83..cb2ad543b1 100644
--- a/collects/racket/flonum.rkt
+++ b/collects/racket/flonum.rkt
@@ -1,5 +1,5 @@
-#lang scheme
-(require '#%flfxnum)
+#lang racket/base
+(require '#%flfxnum (for-syntax racket/base))
 
 (provide fl+ fl- fl* fl/
          flabs flsqrt flexp fllog