diff --git a/homeassistant/components/acaia/entity.py b/homeassistant/components/acaia/entity.py
index db01b414b99..bef1ac313ca 100644
--- a/homeassistant/components/acaia/entity.py
+++ b/homeassistant/components/acaia/entity.py
@@ -2,7 +2,11 @@
 
 from dataclasses import dataclass
 
-from homeassistant.helpers.device_registry import DeviceInfo, format_mac
+from homeassistant.helpers.device_registry import (
+    CONNECTION_BLUETOOTH,
+    DeviceInfo,
+    format_mac,
+)
 from homeassistant.helpers.entity import EntityDescription
 from homeassistant.helpers.update_coordinator import CoordinatorEntity
 
@@ -33,6 +37,7 @@ class AcaiaEntity(CoordinatorEntity[AcaiaCoordinator]):
             manufacturer="Acaia",
             model=self._scale.model,
             suggested_area="Kitchen",
+            connections={(CONNECTION_BLUETOOTH, self._scale.mac)},
         )
 
     @property
diff --git a/tests/components/acaia/snapshots/test_init.ambr b/tests/components/acaia/snapshots/test_init.ambr
index 1cc3d8dbbc0..7011b20f68c 100644
--- a/tests/components/acaia/snapshots/test_init.ambr
+++ b/tests/components/acaia/snapshots/test_init.ambr
@@ -5,6 +5,10 @@
     'config_entries': <ANY>,
     'configuration_url': None,
     'connections': set({
+      tuple(
+        'bluetooth',
+        'aa:bb:cc:dd:ee:ff',
+      ),
     }),
     'disabled_by': None,
     'entry_type': None,