diff --git a/hcloud/load_balancers/domain.py b/hcloud/load_balancers/domain.py
index ffc430ac..02d14805 100644
--- a/hcloud/load_balancers/domain.py
+++ b/hcloud/load_balancers/domain.py
@@ -76,7 +76,7 @@ def __init__(
         id: int,
         name: str | None = None,
         public_net: PublicNetwork | None = None,
-        private_net: PrivateNet | None = None,
+        private_net: list[PrivateNet] | None = None,
         location: BoundLocation | None = None,
         algorithm: LoadBalancerAlgorithm | None = None,
         services: list[LoadBalancerService] | None = None,