diff --git a/docs/flutter/example/pie_charts/outside_label.md b/docs/flutter/example/pie_charts/outside_label.md
index ff44e81e2..299e57600 100644
--- a/docs/flutter/example/pie_charts/outside_label.md
+++ b/docs/flutter/example/pie_charts/outside_label.md
@@ -39,7 +39,7 @@ class PieOutsideLabelChart extends StatelessWidget {
         //       new charts.ArcLabelDecorator(
         //          insideLabelStyleSpec: new charts.TextStyleSpec(...),
         //          outsideLabelStyleSpec: new charts.TextStyleSpec(...)),
-        defaultRenderer: new charts.ArcRendererConfig(arcRendererDecorators: [
+        defaultRenderer: new charts.ArcRendererConfig<Object>(arcRendererDecorators: [
           new charts.ArcLabelDecorator(
               labelPosition: charts.ArcLabelPosition.outside)
         ]));