diff --git a/lib/extension/homeassistant.ts b/lib/extension/homeassistant.ts
index dca8a5fcc..facddd065 100644
--- a/lib/extension/homeassistant.ts
+++ b/lib/extension/homeassistant.ts
@@ -302,6 +302,7 @@ export default class HomeAssistant extends Extension {
                         command_topic: true,
                         command_topic_prefix: endpoint,
                         command_topic_postfix: tempCalibration.property,
+                        device_class: 'temperature',
                         entity_category: 'config',
                         icon: 'mdi:math-compass',
                         ...(tempCalibration.unit && {unit_of_measurement: tempCalibration.unit}),