diff --git a/homeassistant/components/esphome/lock.py b/homeassistant/components/esphome/lock.py
index 12666971d71..947ea4729bb 100644
--- a/homeassistant/components/esphome/lock.py
+++ b/homeassistant/components/esphome/lock.py
@@ -38,9 +38,11 @@ class EsphomeLock(EsphomeEntity[LockInfo, LockEntityState], LockEntity):
         return self._static_info.assumed_state
 
     @property
-    def supported_features(self) -> LockEntityFeature | int:
+    def supported_features(self) -> LockEntityFeature:
         """Flag supported features."""
-        return LockEntityFeature.OPEN if self._static_info.supports_open else 0
+        if self._static_info.supports_open:
+            return LockEntityFeature.OPEN
+        return LockEntityFeature(0)
 
     @property
     def code_format(self) -> str | None:
diff --git a/homeassistant/components/lock/__init__.py b/homeassistant/components/lock/__init__.py
index 412e314da0f..5008fa0ca2b 100644
--- a/homeassistant/components/lock/__init__.py
+++ b/homeassistant/components/lock/__init__.py
@@ -112,7 +112,7 @@ class LockEntity(Entity):
     _attr_is_unlocking: bool | None = None
     _attr_is_jammed: bool | None = None
     _attr_state: None = None
-    _attr_supported_features: LockEntityFeature | int = 0
+    _attr_supported_features: LockEntityFeature = LockEntityFeature(0)
 
     @property
     def changed_by(self) -> str | None:
@@ -193,6 +193,6 @@ class LockEntity(Entity):
         return STATE_LOCKED if locked else STATE_UNLOCKED
 
     @property
-    def supported_features(self) -> LockEntityFeature | int:
+    def supported_features(self) -> LockEntityFeature:
         """Return the list of supported features."""
         return self._attr_supported_features
diff --git a/homeassistant/components/mqtt/lock.py b/homeassistant/components/mqtt/lock.py
index ec1a3f2a897..525d85b5a6c 100644
--- a/homeassistant/components/mqtt/lock.py
+++ b/homeassistant/components/mqtt/lock.py
@@ -136,9 +136,9 @@ class MqttLock(MqttEntity, LockEntity):
             entity=self,
         ).async_render_with_possible_json_value
 
-        self._attr_supported_features = (
-            LockEntityFeature.OPEN if CONF_PAYLOAD_OPEN in config else 0
-        )
+        self._attr_supported_features = LockEntityFeature(0)
+        if CONF_PAYLOAD_OPEN in config:
+            self._attr_supported_features |= LockEntityFeature.OPEN
 
     def _prepare_subscribe_topics(self) -> None:
         """(Re)Subscribe to topics."""
diff --git a/pylint/plugins/hass_enforce_type_hints.py b/pylint/plugins/hass_enforce_type_hints.py
index a7c8782197f..e2e889e71b3 100644
--- a/pylint/plugins/hass_enforce_type_hints.py
+++ b/pylint/plugins/hass_enforce_type_hints.py
@@ -1583,7 +1583,7 @@ _INHERITANCE_MATCH: dict[str, list[ClassTypeHintMatch]] = {
                 ),
                 TypeHintMatch(
                     function_name="supported_features",
-                    return_type=["LockEntityFeature", "int"],
+                    return_type="LockEntityFeature",
                 ),
                 TypeHintMatch(
                     function_name="lock",