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-rw-r--r--ext/tk/lib/tkextlib/bwidget/label.rb5
1 files changed, 5 insertions, 0 deletions
diff --git a/ext/tk/lib/tkextlib/bwidget/label.rb b/ext/tk/lib/tkextlib/bwidget/label.rb
index 1d4c638705..68bf8cdac4 100644
--- a/ext/tk/lib/tkextlib/bwidget/label.rb
+++ b/ext/tk/lib/tkextlib/bwidget/label.rb
@@ -19,6 +19,11 @@ class Tk::BWidget::Label
WidgetClassName = 'Label'.freeze
WidgetClassNames[WidgetClassName] = self
+ def __tkvariable_optkeys
+ super() << 'helpvar'
+ end
+ private :__tkvariable_optkeys
+
def set_focus
tk_send_without_enc('setfocus')
self