diff --git a/ext/tk/sample/demos-jp/hscale.rb b/ext/tk/sample/demos-jp/hscale.rb
index 0607792a74..2d2e11336f 100644
--- a/ext/tk/sample/demos-jp/hscale.rb
+++ b/ext/tk/sample/demos-jp/hscale.rb
@@ -2,7 +2,7 @@
 # frozen_string_literal: false
 require "tkcanvas"
 
-if defined?($hscale_demo) && $hscale_deom
+if defined?($hscale_demo) && $hscale_demo
   $hscale_demo.destroy
   $hscale_demo = nil
 end