diff --git a/src/game/ranking/ranking.js b/src/game/ranking/ranking.js
index eace75b..5c81bbd 100644
--- a/src/game/ranking/ranking.js
+++ b/src/game/ranking/ranking.js
@@ -297,9 +297,9 @@ var Ranking = {
 			sessionStorageManager.getMaestroID(),
 			this.date,
 			this.time,
-			(type, rankingRecordManager) => {
+			(function(type, rankingRecordManager) {
 				this.showRanking(rankingRecordManager);
-			}
+			}).bind(this),
 		);
 	},