diff --git a/nixos/machines/apollo/configuration.nix b/nixos/machines/apollo/configuration.nix
index 622fbb6f..0b63b1f2 100644
--- a/nixos/machines/apollo/configuration.nix
+++ b/nixos/machines/apollo/configuration.nix
@@ -34,6 +34,8 @@ in {
           publicKey = wireguard.pub.hera;
           allowedIPs = [ "::/0" ];
           endpoint = "[${hosts.hera-wg-host}]:${builtins.toString wireguard.port}";
+          # If v6 is not available:
+          # endpoint = "[${hosts.hera-v4}]:${builtins.toString wireguard.port}";
           presharedKeyFile = "/etc/nixos/common/secret/wireguard-psk";
           persistentKeepalive = 25;
         }];