diff --git a/lib/matrix_api/matrix_api.dart b/lib/matrix_api/matrix_api.dart
index c3dd5f04..a8ae5c1c 100644
--- a/lib/matrix_api/matrix_api.dart
+++ b/lib/matrix_api/matrix_api.dart
@@ -257,6 +257,7 @@ class MatrixApi {
     String token,
     String deviceId,
     String initialDeviceDisplayName,
+    Map<String, dynamic> auth,
   }) async {
     final response = await request(RequestType.POST, '/client/r0/login', data: {
       'type': type,
@@ -272,6 +273,7 @@ class MatrixApi {
       if (deviceId != null) 'device_id': deviceId,
       if (initialDeviceDisplayName != null)
         'initial_device_display_name': initialDeviceDisplayName,
+      if (auth != null) 'auth': auth,
     });
     return LoginResponse.fromJson(response);
   }
diff --git a/lib/src/client.dart b/lib/src/client.dart
index 4d9f5703..251e0c2b 100644
--- a/lib/src/client.dart
+++ b/lib/src/client.dart
@@ -348,6 +348,7 @@ class Client extends MatrixApi {
     String token,
     String deviceId,
     String initialDeviceDisplayName,
+    Map<String, dynamic> auth,
   }) async {
     final loginResp = await super.login(
       type: type,
@@ -359,6 +360,7 @@ class Client extends MatrixApi {
       medium: medium,
       address: address,
       token: token,
+      auth: auth,
     );
 
     // Connect if there is an access token in the response.