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-rw-r--r--ext/tk/sample/scrollframe.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/ext/tk/sample/scrollframe.rb b/ext/tk/sample/scrollframe.rb
index e340e1d..e9d8af7 100644
--- a/ext/tk/sample/scrollframe.rb
+++ b/ext/tk/sample/scrollframe.rb
@@ -13,6 +13,8 @@
#
require 'tk'
+module Tk::RbWidget; end
+
class Tk::RbWidget::ScrollFrame < TkFrame
include TkComposite