diff --git a/src/pong.ts b/src/pong.ts
index 0985041..d7ed2b2 100644
--- a/src/pong.ts
+++ b/src/pong.ts
@@ -92,7 +92,7 @@ class PongCore {
     }
 
     start() {
-        setInterval(this.loop, this.timeout);
+        setInterval(g_pong.loop, g_pong.timeout);
     }
 
     reset() {