diff --git a/custom_components/xiaomi_home/miot/specs/specv2entity.py b/custom_components/xiaomi_home/miot/specs/specv2entity.py
index 3751283..ed733dd 100644
--- a/custom_components/xiaomi_home/miot/specs/specv2entity.py
+++ b/custom_components/xiaomi_home/miot/specs/specv2entity.py
@@ -255,6 +255,7 @@ SPEC_DEVICE_TRANS_MAP: dict[str, dict | str] = {
                 },
             }
         },
+        'optional': {},
         'entity': 'heater'
     }
 }