1 files changed, 7 insertions, 5 deletions
diff --git a/ext/tk/lib/tkextlib/tile/tcheckbutton.rb b/ext/tk/lib/tkextlib/tile/tcheckbutton.rb
index ca79d89e58..01751ede0f 100644
--- a/ext/tk/lib/tkextlib/tile/tcheckbutton.rb
+++ b/ext/tk/lib/tkextlib/tile/tcheckbutton.rb
@@ -15,10 +15,6 @@ module Tk
   end
 end
 
-Tk.__set_toplevel_aliases__(:Ttk, Tk::Tile::Checkbutton,
-                            :TkCheckbutton, :TkCheckButton)
-
-
 class Tk::Tile::TCheckButton < Tk::CheckButton
   include Tk::Tile::TileWidget
 
@@ -28,9 +24,15 @@ class Tk::Tile::TCheckButton < Tk::CheckButton
     TkCommandNames = ['::tcheckbutton'.freeze].freeze
   end
   WidgetClassName = 'TCheckbutton'.freeze
-  WidgetClassNames[WidgetClassName] = self
+  WidgetClassNames[WidgetClassName] ||= self
 
   def self.style(*args)
     [self::WidgetClassName, *(args.map!{|a| _get_eval_string(a)})].join('.')
   end
 end
+
+#Tk.__set_toplevel_aliases__(:Ttk, Tk::Tile::Checkbutton,
+#                            :TkCheckbutton, :TkCheckButton)
+Tk.__set_loaded_toplevel_aliases__('tkextlib/tile/tcheckbutton.rb',
+                                   :Ttk, Tk::Tile::Checkbutton,
+                                   :TkCheckbutton, :TkCheckButton)