diff --git a/supervisor/api/const.py b/supervisor/api/const.py
index 5a59a8d53..0e4b3bdaa 100644
--- a/supervisor/api/const.py
+++ b/supervisor/api/const.py
@@ -2,8 +2,8 @@
 
 ATTR_AGENT_VERSION = "agent_version"
 ATTR_BOOT_TIMESTAMP = "boot_timestamp"
+ATTR_DATA_DISK = "data_disk"
 ATTR_DEVICE = "device"
-ATTR_DISK_DATA = "disk_data"
 ATTR_DT_SYNCHRONIZED = "dt_synchronized"
 ATTR_DT_UTC = "dt_utc"
 ATTR_STARTUP_TIME = "startup_time"
diff --git a/supervisor/api/os.py b/supervisor/api/os.py
index 8ba8d193d..e5fdf8788 100644
--- a/supervisor/api/os.py
+++ b/supervisor/api/os.py
@@ -17,7 +17,7 @@ from ..const import (
 )
 from ..coresys import CoreSysAttributes
 from ..validate import version_tag
-from .const import ATTR_DEVICE, ATTR_DISK_DATA
+from .const import ATTR_DATA_DISK, ATTR_DEVICE
 from .utils import api_process, api_validate
 
 _LOGGER: logging.Logger = logging.getLogger(__name__)
@@ -38,7 +38,7 @@ class APIOS(CoreSysAttributes):
             ATTR_UPDATE_AVAILABLE: self.sys_os.need_update,
             ATTR_BOARD: self.sys_os.board,
             ATTR_BOOT: self.sys_dbus.rauc.boot_slot,
-            ATTR_DISK_DATA: self.sys_os.datadisk.disk_used,
+            ATTR_DATA_DISK: self.sys_os.datadisk.disk_used,
         }
 
     @api_process
diff --git a/tests/api/test_os.py b/tests/api/test_os.py
index cacc694ac..a470195e5 100644
--- a/tests/api/test_os.py
+++ b/tests/api/test_os.py
@@ -21,7 +21,7 @@ async def test_api_os_info(api_client):
         "update_available",
         "board",
         "boot",
-        "disk_data",
+        "data_disk",
     ):
         assert attr in result["data"]
 
@@ -35,7 +35,7 @@ async def test_api_os_info_with_agent(api_client, coresys: CoreSys):
     resp = await api_client.get("/os/info")
     result = await resp.json()
 
-    assert result["data"]["disk_data"] == "/dev/sda"
+    assert result["data"]["data_disk"] == "/dev/sda"
 
 
 @pytest.mark.asyncio