diff --git a/examples/widgets/sector.dart b/examples/widgets/sector.dart
index ff0ff60b734..1bf38a3e325 100644
--- a/examples/widgets/sector.dart
+++ b/examples/widgets/sector.dart
@@ -28,7 +28,7 @@ RenderBox initCircle() {
 class SectorApp extends App {
 
   RenderBoxToRenderSectorAdapter sectors = initCircle();
-  math.Random rand = new math.Random();
+  math.Random rand = new math.Random(1);
 
   void addSector() {
     double deltaTheta;