diff --git a/homeassistant/components/zwave_js/binary_sensor.py b/homeassistant/components/zwave_js/binary_sensor.py
index f6480689910..7fa20b2b1f5 100644
--- a/homeassistant/components/zwave_js/binary_sensor.py
+++ b/homeassistant/components/zwave_js/binary_sensor.py
@@ -90,7 +90,7 @@ NOTIFICATION_SENSOR_MAPPINGS: tuple[NotificationZWaveJSEntityDescription, ...] =
         # NotificationType 2: Carbon Monoxide - State Id's 1 and 2
         key=NOTIFICATION_CARBON_MONOOXIDE,
         states=("1", "2"),
-        device_class=BinarySensorDeviceClass.GAS,
+        device_class=BinarySensorDeviceClass.CO,
     ),
     NotificationZWaveJSEntityDescription(
         # NotificationType 2: Carbon Monoxide - All other State Id's