diff --git a/custom_components/xiaomi_gateway3/hass/entity_description.py b/custom_components/xiaomi_gateway3/hass/entity_description.py
index 1f2c878b..9fa207c9 100644
--- a/custom_components/xiaomi_gateway3/hass/entity_description.py
+++ b/custom_components/xiaomi_gateway3/hass/entity_description.py
@@ -187,7 +187,7 @@
     },
     "fault": {"category": DIAGNOSTIC},
     "sensor.idle_time": {
-        "class": SENSOR.TEMPERATURE,
+        "class": SENSOR.DURATION,
         "icon": "mdi:timer",
         "units": UnitOfTime.SECONDS,
         "category": DIAGNOSTIC,