diff --git a/lib/game/components/initial_position.dart b/lib/game/components/initial_position.dart
index 3b22938a..aa4acb46 100644
--- a/lib/game/components/initial_position.dart
+++ b/lib/game/components/initial_position.dart
@@ -2,7 +2,7 @@ import 'package:flame_forge2d/flame_forge2d.dart';
 
 /// Forces a given [BodyComponent] to position their [body] to an
 /// [initialPosition].
-mixin InitialPosition on BodyComponent {
+mixin InitialPosition<T extends Forge2DGame> on BodyComponent<T> {
   /// The initial position of the [body].
   late final Vector2 initialPosition;