diff --git a/custom_components/ds_air/ds_air_service/ctrl_enum.py b/custom_components/ds_air/ds_air_service/ctrl_enum.py
index 87b8220..d0b5931 100644
--- a/custom_components/ds_air/ds_air_service/ctrl_enum.py
+++ b/custom_components/ds_air/ds_air_service/ctrl_enum.py
@@ -338,6 +338,7 @@ class EnumControl:
     def get_mode_name(idx):
         return _MODE_NAME_LIST[idx]
 
+    @staticmethod
     def get_action_name(idx):
         return _MODE_ACTION_LIST[idx]