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-rw-r--r--ext/tk/lib/tkextlib/bwidget/spinbox.rb5
1 files changed, 5 insertions, 0 deletions
diff --git a/ext/tk/lib/tkextlib/bwidget/spinbox.rb b/ext/tk/lib/tkextlib/bwidget/spinbox.rb
index a5ddfafbf4..9560abb663 100644
--- a/ext/tk/lib/tkextlib/bwidget/spinbox.rb
+++ b/ext/tk/lib/tkextlib/bwidget/spinbox.rb
@@ -22,6 +22,11 @@ class Tk::BWidget::SpinBox
WidgetClassName = 'SpinBox'.freeze
WidgetClassNames[WidgetClassName] = self
+ def __tkvariable_optkeys
+ super() << 'helpvar'
+ end
+ private :__tkvariable_optkeys
+
#def entrybind(*args)
# _bind([path, 'bind'], *args)
# self