diff --git a/beautiful-racket-demo/basic-demo/colorer.rkt b/beautiful-racket-demo/basic-demo/colorer.rkt
deleted file mode 100644
index ad8890e..0000000
--- a/beautiful-racket-demo/basic-demo/colorer.rkt
+++ /dev/null
@@ -1,2 +0,0 @@
-#lang br
-;; nothing
\ No newline at end of file
diff --git a/beautiful-racket-demo/basic-demo/expander.rkt b/beautiful-racket-demo/basic-demo/expander.rkt
index b436835..7d1028f 100644
--- a/beautiful-racket-demo/basic-demo/expander.rkt
+++ b/beautiful-racket-demo/basic-demo/expander.rkt
@@ -15,7 +15,7 @@
        LINE ...
        (define line-table
          (apply hasheqv (append (list NUM LINE-FUNC) ...)))
-       (run line-table))))
+       (void (run line-table)))))
 (provide (rename-out [b-module-begin #%module-begin]))
 
 (struct end-program-signal ())