diff --git a/synapse/config/homeserver.py b/synapse/config/homeserver.py
index be65554524..09def49197 100644
--- a/synapse/config/homeserver.py
+++ b/synapse/config/homeserver.py
@@ -13,8 +13,8 @@
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
-
from ._base import RootConfig
+from .account_validity import AccountValidityConfig
from .api import ApiConfig
from .appservice import AppServiceConfig
from .cache import CacheConfig
@@ -23,6 +23,7 @@ from .cas import CasConfig
from .consent_config import ConsentConfig
from .database import DatabaseConfig
from .emailconfig import EmailConfig
+from .experimental import ExperimentalConfig
from .federation import FederationConfig
from .groups import GroupsConfig
from .jwt_config import JWTConfig
@@ -57,6 +58,7 @@ class HomeServerConfig(RootConfig):
config_classes = [
ServerConfig,
+ ExperimentalConfig,
TlsConfig,
FederationConfig,
CacheConfig,
@@ -67,6 +69,7 @@ class HomeServerConfig(RootConfig):
CaptchaConfig,
VoipConfig,
RegistrationConfig,
+ AccountValidityConfig,
MetricsConfig,
ApiConfig,
AppServiceConfig,
|