New class syntax.
diff --git a/Lib/lib-stdwin/StripChart.py b/Lib/lib-stdwin/StripChart.py
index 67d7de1..d58f835 100644
--- a/Lib/lib-stdwin/StripChart.py
+++ b/Lib/lib-stdwin/StripChart.py
@@ -6,7 +6,7 @@
# A StripChart doesn't really look like a label but it needs a base class.
# LabelAppearance allows it to be disabled and hilited.
-class StripChart() = LabelAppearance(), NoReactivity():
+class StripChart(LabelAppearance, NoReactivity):
#
def define(self, (parent, scale)):
self.parent = parent