diff --git a/homeassistant/components/humidifier/__init__.py b/homeassistant/components/humidifier/__init__.py
index 61d7b6c3944..0bc7e242d55 100644
--- a/homeassistant/components/humidifier/__init__.py
+++ b/homeassistant/components/humidifier/__init__.py
@@ -125,7 +125,7 @@ async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
 class HumidifierEntityDescription(ToggleEntityDescription):
     """A class that describes humidifier entities."""
 
-    device_class: HumidifierDeviceClass | str | None = None
+    device_class: HumidifierDeviceClass | None = None
 
 
 class HumidifierEntity(ToggleEntity):
@@ -133,7 +133,7 @@ class HumidifierEntity(ToggleEntity):
 
     entity_description: HumidifierEntityDescription
     _attr_available_modes: list[str] | None
-    _attr_device_class: HumidifierDeviceClass | str | None
+    _attr_device_class: HumidifierDeviceClass | None
     _attr_max_humidity: int = DEFAULT_MAX_HUMIDITY
     _attr_min_humidity: int = DEFAULT_MIN_HUMIDITY
     _attr_mode: str | None
@@ -154,7 +154,7 @@ class HumidifierEntity(ToggleEntity):
         return data
 
     @property
-    def device_class(self) -> HumidifierDeviceClass | str | None:
+    def device_class(self) -> HumidifierDeviceClass | None:
         """Return the class of this entity."""
         if hasattr(self, "_attr_device_class"):
             return self._attr_device_class
diff --git a/pylint/plugins/hass_enforce_type_hints.py b/pylint/plugins/hass_enforce_type_hints.py
index 4f7b9053ca0..7cfd5d32914 100644
--- a/pylint/plugins/hass_enforce_type_hints.py
+++ b/pylint/plugins/hass_enforce_type_hints.py
@@ -1413,7 +1413,7 @@ _INHERITANCE_MATCH: dict[str, list[ClassTypeHintMatch]] = {
                 ),
                 TypeHintMatch(
                     function_name="device_class",
-                    return_type=["HumidifierDeviceClass", "str", None],
+                    return_type=["HumidifierDeviceClass", None],
                 ),
                 TypeHintMatch(
                     function_name="min_humidity",