diff --git a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/profile/AlarmState.java b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/profile/AlarmState.java
index fb6b07e89d..80f736d5db 100644
--- a/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/profile/AlarmState.java
+++ b/rule-engine/rule-engine-components/src/main/java/org/thingsboard/rule/engine/profile/AlarmState.java
@@ -223,7 +223,11 @@ class AlarmState {
             currentAlarm.setType(alarmDefinition.getAlarmType());
             currentAlarm.setStatus(AlarmStatus.ACTIVE_UNACK);
             currentAlarm.setSeverity(severity);
-            currentAlarm.setStartTs(dataSnapshot.getTs());
+            long startTs = dataSnapshot.getTs();
+            if (startTs == 0L) {
+                startTs = System.currentTimeMillis();
+            }
+            currentAlarm.setStartTs(startTs);
             currentAlarm.setEndTs(currentAlarm.getStartTs());
             currentAlarm.setDetails(createDetails(ruleState));
             currentAlarm.setOriginator(originator);