diff --git a/doc/examples/particles/lib/main.dart b/doc/examples/particles/lib/main.dart
index e3ed898a5..98d1e67f7 100644
--- a/doc/examples/particles/lib/main.dart
+++ b/doc/examples/particles/lib/main.dart
@@ -352,7 +352,7 @@ class MyGame extends BaseGame {
           paint: Paint()..blendMode = BlendMode.difference,
           child: CircleParticle(
             radius: 12.0,
-            paint: Paint()..color = randomMaterialColor()
+            paint: Paint()..color = randomMaterialColor(),
           ),
         ),
       ),