diff --git a/lib/extension/homeassistant.js b/lib/extension/homeassistant.js
index 93b5b47fc..e1070f899 100644
--- a/lib/extension/homeassistant.js
+++ b/lib/extension/homeassistant.js
@@ -904,7 +904,7 @@ const mapping = {
     'HS1-WL-E': [cfg.binary_sensor_water_leak],
     '421786': [cfg.light_brightness],
     'ICZB-IW11D': [cfg.light_brightness],
-    '3321-S': [cfg.binary_sensor_contact, cfg.sensor_temperature],
+    '3321-S': [cfg.binary_sensor_contact, cfg.sensor_temperature, cfg.sensor_battery],
     'ZPIR-8000': [cfg.binary_sensor_occupancy, cfg.sensor_battery],
     'ZCTS-808': [cfg.binary_sensor_contact, cfg.sensor_battery],
     'ZNLDP12LM': [cfg.light_brightness_colortemp],