diff --git a/ff0fsum4zx.js b/ff0fsum4zx.js
index 1f1924b..b29a144 100644
--- a/ff0fsum4zx.js
+++ b/ff0fsum4zx.js
@@ -410,7 +410,7 @@ R3.Event.Subscribe(
         this.mouseMove.entityLoaded = this;
         this.touchMove.entityLoaded = this;
         this.beforeRender.entityLoaded = this;
-    }
+    }.bind(this)
 );
 
 R3.Event.Emit(R3.Event.GAME_LOADED);