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-rw-r--r--ext/tk/lib/tk/root.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/ext/tk/lib/tk/root.rb b/ext/tk/lib/tk/root.rb
index ca6260927a..b4f0bd107f 100644
--- a/ext/tk/lib/tk/root.rb
+++ b/ext/tk/lib/tk/root.rb
@@ -52,7 +52,7 @@ class Tk::Root<TkWindow
end
WidgetClassName = 'Tk'.freeze
- WidgetClassNames[WidgetClassName] = self
+ WidgetClassNames[WidgetClassName] ||= self
def self.to_eval
# self::WidgetClassName