diff --git a/homeassistant/helpers/device_registry.py b/homeassistant/helpers/device_registry.py
index a19f476495a..f133eba8f92 100644
--- a/homeassistant/helpers/device_registry.py
+++ b/homeassistant/helpers/device_registry.py
@@ -38,6 +38,7 @@ STORAGE_VERSION_MINOR = 3
 SAVE_DELAY = 10
 CLEANUP_DELAY = 10
 
+CONNECTION_BLUETOOTH = "bluetooth"
 CONNECTION_NETWORK_MAC = "mac"
 CONNECTION_UPNP = "upnp"
 CONNECTION_ZIGBEE = "zigbee"