diff --git a/source/_components/device_tracker.markdown b/source/_components/device_tracker.markdown
index 0cb71ebb9db..da46cdae60e 100644
--- a/source/_components/device_tracker.markdown
+++ b/source/_components/device_tracker.markdown
@@ -34,7 +34,7 @@ device_tracker:
   consider_home: 180
 ```
 
-Once tracked, a file will be created in your config dir called `known_devices.yaml`. Edit this file to adjust which devices to be tracked. Here you can also setup a URL for each device to be used as the entity picture and set whether the device will be show in the UI when in the away state.
+Once tracked, a file will be created in your config dir called `known_devices.yaml`. Edit this file to adjust which devices to be tracked. Here you can also setup a URL for each device to be used as the entity picture and set whether the device will be show in the UI when in the away state. You can also put an email address in as the entity picture to pull the [Gravatar](https://gravatar.com) for the given address.
 
 Multiple device trackers can be used in parallel, such as [Owntracks](/components/device_tracker.owntracks/) and [Nmap](/components/device_tracker.nmap_scanner/). The state of the device will be determined by the source that reported last. Device tracker will look for global settings (`track_new_devices`, `consider_home`, and `home_interval`) under the configuration of the first platform.