diff --git a/app.js b/app.js
index 8d5e451..98aff1c 100644
--- a/app.js
+++ b/app.js
@@ -76,7 +76,7 @@ async function commitMessage(now, logDevice) {
 			} else {
 				logDevice.stts_engine = GpsTracksModels.STTS_EN_STOPING;
 			}
-			logDevice.stts_oil_electricity = lastHeartbeatOrAlarm[0].stts_oil_electricity;
+			logDevice.stts_oil_electricity = lastHeartbeatOrAlarm[0]?.stts_oil_electricity ?? 0;
 			logDevice.stts_alarm = lastHeartbeatOrAlarm[0].stts_alarm;
 			logDevice.stts_charge = lastHeartbeatOrAlarm[0].stts_charge;
 			logDevice.stts_acc = lastHeartbeatOrAlarm[0].stts_acc;