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-rw-r--r--ext/tk/lib/tkextlib/blt/stripchart.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/tk/lib/tkextlib/blt/stripchart.rb b/ext/tk/lib/tkextlib/blt/stripchart.rb
index faac8d830b..b8cbf8bc34 100644
--- a/ext/tk/lib/tkextlib/blt/stripchart.rb
+++ b/ext/tk/lib/tkextlib/blt/stripchart.rb
@@ -14,6 +14,7 @@ module Tk::BLT
WidgetClassNames[WidgetClassName] = self
include PlotComponent
+ include GraphCommand
def __boolval_optkeys
['bufferelements', 'buffergraph', 'invertxy']