diff --git a/homeassistant/components/xiaomi_ble/sensor.py b/homeassistant/components/xiaomi_ble/sensor.py
index 3b2fcddc1971..baea9c709531 100644
--- a/homeassistant/components/xiaomi_ble/sensor.py
+++ b/homeassistant/components/xiaomi_ble/sensor.py
@@ -145,10 +145,9 @@ SENSOR_DESCRIPTIONS = {
         key=str(ExtendedSensorDeviceClass.SCORE),
         state_class=SensorStateClass.MEASUREMENT,
     ),
-    # Counting during brushing
-    (ExtendedSensorDeviceClass.COUNTER, Units.TIME_SECONDS): SensorEntityDescription(
+    # Counter of brushing
+    (ExtendedSensorDeviceClass.COUNTER, None): SensorEntityDescription(
         key=str(ExtendedSensorDeviceClass.COUNTER),
-        native_unit_of_measurement=UnitOfTime.SECONDS,
         state_class=SensorStateClass.MEASUREMENT,
     ),
     # Key id for locks and fingerprint readers