diff --git a/source/_components/device_tracker.bluetooth_tracker.markdown b/source/_components/device_tracker.bluetooth_tracker.markdown
index c29f4c92b35..20d2b5617c7 100644
--- a/source/_components/device_tracker.bluetooth_tracker.markdown
+++ b/source/_components/device_tracker.bluetooth_tracker.markdown
@@ -15,6 +15,10 @@ ha_release: 0.18
 
 This tracker discovers new devices on boot and tracks bluetooth devices periodically based on interval_seconds value. It is not required to pair the devices with each other! Devices discovered are stored with 'bt_' as the prefix for device mac addresses in `known_devices.yaml`.
 
+<p class='note'>
+If you are using [Hass.io](/hassio/) you will need to enable the Bluetooth BCM43xx (/addons/bluetooth_bcm43xx/) addon.
+</p>
+
 To use the Bluetooth tracker in your installation, add the following to your `configuration.yaml` file:
 
 ```yaml