diff --git a/map/game/game.js b/map/game/game.js
index e80a41e..8690024 100644
--- a/map/game/game.js
+++ b/map/game/game.js
@@ -30,7 +30,7 @@
     function stopGPS() {
 	console.log("watchId="+watchId);
 	if (watchId != null) {
-	    navigator.geolocation.clearWatch(eatchId);
+	    navigator.geolocation.clearWatch(watchId);
 	    document.getElementById("title").textContent = "stop";
 	    gpsmarker.setPopupContent("停めました");
 	}