diff --git a/tasmota/xdrv_10_rules.ino b/tasmota/xdrv_10_rules.ino
index a35391bb5..c377c4a91 100644
--- a/tasmota/xdrv_10_rules.ino
+++ b/tasmota/xdrv_10_rules.ino
@@ -719,6 +719,9 @@ bool RuleSetProcess(uint8_t rule_set, String &event_saved)
       RulesVarReplace(commands, F("%UPTIME%"), String(MinutesUptime()));
       RulesVarReplace(commands, F("%TIMESTAMP%"), GetDateAndTime(DT_LOCAL));
       RulesVarReplace(commands, F("%TOPIC%"), mqtt_topic);
+      char unique_id[7];
+      snprintf_P(unique_id, sizeof(unique_id), PSTR("%06X"), ESP_getChipId());
+      RulesVarReplace(commands, F("%DEVICEID%"), unique_id);
 #if defined(USE_TIMERS) && defined(USE_SUNRISE)
       RulesVarReplace(commands, F("%SUNRISE%"), String(SunMinutes(0)));
       RulesVarReplace(commands, F("%SUNSET%"), String(SunMinutes(1)));