diff --git a/homeassistant/components/alarm_control_panel/__init__.py b/homeassistant/components/alarm_control_panel/__init__.py
index dd42c6c7072..9c53f2b7fd0 100644
--- a/homeassistant/components/alarm_control_panel/__init__.py
+++ b/homeassistant/components/alarm_control_panel/__init__.py
@@ -233,7 +233,12 @@ class AlarmControlPanelEntity(Entity, cached_properties=CACHED_PROPERTIES_WITH_A
     @cached_property
     def supported_features(self) -> AlarmControlPanelEntityFeature:
         """Return the list of supported features."""
-        return self._attr_supported_features
+        features = self._attr_supported_features
+        if type(features) is int:  # noqa: E721
+            new_features = AlarmControlPanelEntityFeature(features)
+            self._report_deprecated_supported_features_values(new_features)
+            return new_features
+        return features
 
     @final
     @property
diff --git a/tests/components/alarm_control_panel/test_init.py b/tests/components/alarm_control_panel/test_init.py
index c447119c119..1e6fce6def6 100644
--- a/tests/components/alarm_control_panel/test_init.py
+++ b/tests/components/alarm_control_panel/test_init.py
@@ -45,3 +45,26 @@ def test_deprecated_support_alarm_constants(
     import_and_test_deprecated_constant_enum(
         caplog, module, entity_feature, "SUPPORT_ALARM_", "2025.1"
     )
+
+
+def test_deprecated_supported_features_ints(caplog: pytest.LogCaptureFixture) -> None:
+    """Test deprecated supported features ints."""
+
+    class MockAlarmControlPanelEntity(alarm_control_panel.AlarmControlPanelEntity):
+        _attr_supported_features = 1
+
+    entity = MockAlarmControlPanelEntity()
+    assert (
+        entity.supported_features
+        is alarm_control_panel.AlarmControlPanelEntityFeature(1)
+    )
+    assert "MockAlarmControlPanelEntity" in caplog.text
+    assert "is using deprecated supported features values" in caplog.text
+    assert "Instead it should use" in caplog.text
+    assert "AlarmControlPanelEntityFeature.ARM_HOME" in caplog.text
+    caplog.clear()
+    assert (
+        entity.supported_features
+        is alarm_control_panel.AlarmControlPanelEntityFeature(1)
+    )
+    assert "is using deprecated supported features values" not in caplog.text