diff --git a/homeassistant/components/starline/sensor.py b/homeassistant/components/starline/sensor.py
index 16988f1a9dc..916d0a9f26b 100644
--- a/homeassistant/components/starline/sensor.py
+++ b/homeassistant/components/starline/sensor.py
@@ -61,6 +61,7 @@ SENSOR_TYPES: tuple[SensorEntityDescription, ...] = (
     SensorEntityDescription(
         key="fuel",
         translation_key="fuel",
+        device_class=SensorDeviceClass.VOLUME,
         state_class=SensorStateClass.MEASUREMENT,
     ),
     SensorEntityDescription(