diff --git a/homeassistant/components/threshold/binary_sensor.py b/homeassistant/components/threshold/binary_sensor.py
index f7b8c9c097c..09f928303bf 100644
--- a/homeassistant/components/threshold/binary_sensor.py
+++ b/homeassistant/components/threshold/binary_sensor.py
@@ -96,6 +96,7 @@ async def async_setup_entry(
     ):
         device_info = DeviceInfo(
             identifiers=device.identifiers,
+            connections=device.connections,
         )
     else:
         device_info = None
diff --git a/tests/components/threshold/test_binary_sensor.py b/tests/components/threshold/test_binary_sensor.py
index 2180d0aed7f..e26781029c5 100644
--- a/tests/components/threshold/test_binary_sensor.py
+++ b/tests/components/threshold/test_binary_sensor.py
@@ -600,6 +600,7 @@ async def test_device_id(hass: HomeAssistant) -> None:
     source_device_entry = device_registry.async_get_or_create(
         config_entry_id=source_config_entry.entry_id,
         identifiers={("sensor", "identifier_test")},
+        connections={("mac", "30:31:32:33:34:35")},
     )
     source_entity = entity_registry.async_get_or_create(
         "sensor",