diff --git a/app/main/views/webauthn_credentials.py b/app/main/views/webauthn_credentials.py
index 5f097c713..a0e9ddb53 100644
--- a/app/main/views/webauthn_credentials.py
+++ b/app/main/views/webauthn_credentials.py
@@ -53,6 +53,7 @@ def webauthn_complete_register():
         return cbor.encode(str(e)), 400
 
     current_user.create_webauthn_credential(credential)
+    current_user.update(auth_type='webauthn_auth')
 
     flash((
         'Registration complete. Next time you sign in to Notify '
diff --git a/tests/app/main/views/test_webauthn_credentials.py b/tests/app/main/views/test_webauthn_credentials.py
index 011200eaa..19386097b 100644
--- a/tests/app/main/views/test_webauthn_credentials.py
+++ b/tests/app/main/views/test_webauthn_credentials.py
@@ -112,6 +112,7 @@ def test_begin_register_stores_state_in_session(
 def test_complete_register_creates_credential(
     platform_admin_user,
     platform_admin_client,
+    mock_update_user_attribute,
     mocker,
 ):
     with platform_admin_client.session_transaction() as session:
@@ -134,6 +135,10 @@ def test_complete_register_creates_credential(
     assert response.status_code == 200
     credential_mock.assert_called_once_with('state', 'public_key_credential')
     user_api_mock.assert_called_once_with(platform_admin_user['id'], 'cred')
+    mock_update_user_attribute.assert_called_once_with(
+        platform_admin_user['id'],
+        auth_type='webauthn_auth',
+    )
 
 
 def test_complete_register_clears_session(