diff --git a/src/components/ha-attributes.html b/src/components/ha-attributes.html
index 8e533ef330..c66029edb9 100644
--- a/src/components/ha-attributes.html
+++ b/src/components/ha-attributes.html
@@ -36,7 +36,7 @@
     'entity_picture', 'friendly_name', 'icon', 'unit_of_measurement',
     'emulated_hue', 'emulated_hue_name', 'haaska_hidden', 'haaska_name',
     'homebridge_hidden', 'homebridge_name', 'supported_features', 'attribution',
-    'custom_ui_state_card',
+    'custom_ui_state_card', 'device_class',
   ];
   Polymer({
     is: 'ha-attributes',