diff --git a/homeassistant/components/overkiz/climate_entities/atlantic_electrical_towel_dryer.py b/homeassistant/components/overkiz/climate_entities/atlantic_electrical_towel_dryer.py
index 7ab59a47a34..374d7e1164d 100644
--- a/homeassistant/components/overkiz/climate_entities/atlantic_electrical_towel_dryer.py
+++ b/homeassistant/components/overkiz/climate_entities/atlantic_electrical_towel_dryer.py
@@ -57,7 +57,7 @@ class AtlanticElectricalTowelDryer(OverkizEntity, ClimateEntity):
 
         # Not all AtlanticElectricalTowelDryer models support presets, thus we need to check if the command is available
         if self.executor.has_command(OverkizCommand.SET_TOWEL_DRYER_TEMPORARY_STATE):
-            self._attr_supported_features += ClimateEntityFeature.PRESET_MODE
+            self._attr_supported_features |= ClimateEntityFeature.PRESET_MODE
 
     @property
     def hvac_mode(self) -> str: