diff --git a/collects/setup/winvers-change.ss b/collects/setup/winvers-change.ss
index 64624f6ea9..3dc0bb1eec 100644
--- a/collects/setup/winvers-change.ss
+++ b/collects/setup/winvers-change.ss
@@ -8,7 +8,7 @@
 ;; running MzScheme.exe on Windows -- "winvers.ss" uses a trick of making a
 ;; copy of the binary and restarting that copy for the actual change.
 
-#lang scheme
+#lang scheme/base
 
 (define verbose? #t)
 (define binary-extensions '("exe" "dll" "lib" "so" "def" "exp" #|"obj" "o"|#))
diff --git a/collects/setup/winvers.ss b/collects/setup/winvers.ss
index a7e19142a1..a673cc4861 100644
--- a/collects/setup/winvers.ss
+++ b/collects/setup/winvers.ss
@@ -1,6 +1,8 @@
 ;; This is a wrapper around `winvers-change.ss' to patch binary files with the
 ;; current version number.
-#lang scheme
+
+#lang scheme/base
+
 (require mzlib/file "main-collects.ss" "dirs.ss")
 
 (define (make-copy)