diff --git a/homeassistant/components/roborock/select.py b/homeassistant/components/roborock/select.py
index 2dba430fde93db..bd376c03255af3 100644
--- a/homeassistant/components/roborock/select.py
+++ b/homeassistant/components/roborock/select.py
@@ -73,7 +73,9 @@ class RoborockSelectDescription(SelectEntityDescription):
         key="dust_collection_mode",
         translation_key="dust_collection_mode",
         api_command=RoborockCommand.SET_DUST_COLLECTION_MODE,
-        value_fn=lambda api: api.dust_collection_mode.mode.name,  # type: ignore[union-attr]
+        value_fn=lambda api: (
+            mode.name if (mode := api.dust_collection_mode.mode) is not None else None  # type: ignore[union-attr]
+        ),
         entity_category=EntityCategory.CONFIG,
         options_lambda=lambda api: (
             RoborockDockDustCollectionModeCode.keys()
diff --git a/tests/components/roborock/test_select.py b/tests/components/roborock/test_select.py
index 88c639b4b83e70..8c05e13b1b0a9a 100644
--- a/tests/components/roborock/test_select.py
+++ b/tests/components/roborock/test_select.py
@@ -5,6 +5,7 @@
 
 import pytest
 from roborock import RoborockCommand
+from roborock.data.v1 import RoborockDockDustCollectionModeCode
 from roborock.exceptions import RoborockException
 
 from homeassistant.components.roborock import DOMAIN
@@ -154,3 +155,30 @@ async def test_selected_map_without_name(
     select_entity = hass.states.get("select.roborock_s7_maxv_selected_map")
     assert select_entity
     assert select_entity.state == "Map 0"
+
+
+@pytest.mark.parametrize(
+    ("dust_collection_mode", "expected_state"),
+    [
+        (None, "unknown"),
+        (RoborockDockDustCollectionModeCode.smart, "smart"),
+        (RoborockDockDustCollectionModeCode.light, "light"),
+    ],
+)
+async def test_dust_collection_mode_none(
+    hass: HomeAssistant,
+    mock_roborock_entry: MockConfigEntry,
+    fake_vacuum: FakeDevice,
+    dust_collection_mode: RoborockDockDustCollectionModeCode | None,
+    expected_state: str,
+) -> None:
+    """Test that the dust collection mode entity correctly handles mode values."""
+    assert fake_vacuum.v1_properties
+    assert fake_vacuum.v1_properties.dust_collection_mode
+    fake_vacuum.v1_properties.dust_collection_mode.mode = dust_collection_mode
+
+    await async_setup_component(hass, DOMAIN, {})
+
+    select_entity = hass.states.get("select.roborock_s7_maxv_dock_empty_mode")
+    assert select_entity
+    assert select_entity.state == expected_state