diff --git a/aioesphomeapi/api.proto b/aioesphomeapi/api.proto
index 40aa3e4..30d6935 100644
--- a/aioesphomeapi/api.proto
+++ b/aioesphomeapi/api.proto
@@ -1187,7 +1187,7 @@ message BluetoothDeviceConnectionResponse {
   uint64 address = 1;
   bool connected = 2;
   uint32 mtu = 3;
-  bool failed = 4;
+  int error = 4;
 }
 
 message BluetoothGATTGetServicesRequest {
diff --git a/aioesphomeapi/client.py b/aioesphomeapi/client.py
index f7d28e5..2816d64 100644
--- a/aioesphomeapi/client.py
+++ b/aioesphomeapi/client.py
@@ -446,8 +446,7 @@ class APIClient:
     async def bluetooth_device_connect(
         self,
         address: int,
-        on_bluetooth_connection_state: Callable[[bool, int], None],
-        on_bluetooth_connection_failed: Callable[[], None],
+        on_bluetooth_connection_state: Callable[[bool, int, int], None],
         timeout: float = 10.0,
     ) -> Callable[[], None]:
         self._check_authenticated()
@@ -458,9 +457,7 @@ class APIClient:
             if isinstance(msg, BluetoothDeviceConnectionResponse):
                 resp = BluetoothDeviceConnection.from_pb(msg)
                 if address == resp.address:
-                    on_bluetooth_connection_state(resp.connected, resp.mtu)
-                    if resp.failed:
-                        on_bluetooth_connection_failed()
+                    on_bluetooth_connection_state(resp.connected, resp.mtu, resp.error)
 
         assert self._connection is not None
         await self._connection.send_message_callback_response(
diff --git a/aioesphomeapi/model.py b/aioesphomeapi/model.py
index 1c20cb1..0d7286c 100644
--- a/aioesphomeapi/model.py
+++ b/aioesphomeapi/model.py
@@ -804,7 +804,7 @@ class BluetoothDeviceConnection(APIModelBase):
     address: int = 0
     connected: bool = False
     mtu: int = 0
-    failed: bool = False
+    error: int = 0
 
 
 @dataclass(frozen=True)