diff --git a/collects/net/ftp.rkt b/collects/net/ftp.rkt
index 9a704ca76e..5e4ff2a349 100644
--- a/collects/net/ftp.rkt
+++ b/collects/net/ftp.rkt
@@ -1,5 +1,5 @@
-#lang scheme/base
-(require scheme/unit "ftp-sig.ss" "ftp-unit.ss")
+#lang racket/base
+(require racket/unit "ftp-sig.rkt" "ftp-unit.rkt")
 
 (define-values/invoke-unit/infer ftp@)