diff --git a/nixos/systems/blowhole/firewall.nix b/nixos/systems/blowhole/firewall.nix
index a121cd4..8f3e95e 100644
--- a/nixos/systems/blowhole/firewall.nix
+++ b/nixos/systems/blowhole/firewall.nix
@@ -80,7 +80,7 @@ in
     localCommands = ''
       ip link add enp4s0 type dummy || true
       ip link set enp4s0 up || true
-      ip addr add ${secret.network.ips.blowhole.ip}/24 dev enp4s0 || true
+      ip addr add ${secret.network.ips.blowhole.ip or ""}/24 dev enp4s0 || true
     '';
 
     interfaces = {