diff --git a/docs/device_registry_index.md b/docs/device_registry_index.md
index 21f5bbd7..1b0debea 100644
--- a/docs/device_registry_index.md
+++ b/docs/device_registry_index.md
@@ -24,18 +24,19 @@ Although not currently available, we could consider offering an option to users
 
 ## Device properties
 
-| Attribute | Description |
-| --------- | ----------- |
-| id | Unique ID of device (generated by Home Assistant)
-| name | Name of this device
-| connections | A set of tuples of `(connection_type, connection identifier)`. Connection types are defined in the device registry module.
-| identifiers | Set of identifiers. They identify the device in the outside world. An example is a serial number.
-| manufacturer | The manufacturer of the device.
-| model | The model of the device.
-| config_entries | Config entries that are linked to this device.
-| sw_version | The firmware version of the device.
-| via_device | Identifier of a device that routes messages between this device and Home Assistant. Examples of such devices are hubs, or parent devices of a sub-device. This is used to show device topology in Home Assistant.
-| area_id | The Area which the device is placed in.
+| Attribute      | Description                                                                                                                                                                                                       |
+| -------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
+| id             | Unique ID of device (generated by Home Assistant)                                                                                                                                                                 |
+| name           | Name of this device                                                                                                                                                                                               |
+| connections    | A set of tuples of `(connection_type, connection identifier)`. Connection types are defined in the device registry module.                                                                                        |
+| identifiers    | Set of identifiers. They identify the device in the outside world. An example is a serial number.                                                                                                                 |
+| manufacturer   | The manufacturer of the device.                                                                                                                                                                                   |
+| model          | The model of the device.                                                                                                                                                                                          |
+| config_entries | Config entries that are linked to this device.                                                                                                                                                                    |
+| sw_version     | The firmware version of the device.                                                                                                                                                                               |
+| via_device     | Identifier of a device that routes messages between this device and Home Assistant. Examples of such devices are hubs, or parent devices of a sub-device. This is used to show device topology in Home Assistant. |
+| area_id        | The Area which the device is placed in.                                                                                                                                                                           |
+| entry_type     | The type of entry. Possible value is `None` and `"service"`.                                                                                                                                                      |
 
 ## Defining devices