diff --git a/homeassistant/components/starline/sensor.py b/homeassistant/components/starline/sensor.py
index 0629a03e148..874fc5a9a7e 100644
--- a/homeassistant/components/starline/sensor.py
+++ b/homeassistant/components/starline/sensor.py
@@ -1,5 +1,6 @@
 """Reads vehicle status from StarLine API."""
 from homeassistant.components.sensor import DEVICE_CLASS_TEMPERATURE
+from homeassistant.const import TEMP_CELSIUS
 from homeassistant.helpers.entity import Entity
 from homeassistant.helpers.icon import icon_for_battery_level, icon_for_signal_level
 
@@ -10,8 +11,8 @@ from .entity import StarlineEntity
 SENSOR_TYPES = {
     "battery": ["Battery", None, "V", None],
     "balance": ["Balance", None, None, "mdi:cash-multiple"],
-    "ctemp": ["Interior Temperature", DEVICE_CLASS_TEMPERATURE, None, None],
-    "etemp": ["Engine Temperature", DEVICE_CLASS_TEMPERATURE, None, None],
+    "ctemp": ["Interior Temperature", DEVICE_CLASS_TEMPERATURE, TEMP_CELSIUS, None],
+    "etemp": ["Engine Temperature", DEVICE_CLASS_TEMPERATURE, TEMP_CELSIUS, None],
     "gsm_lvl": ["GSM Signal", None, "%", None],
 }