diff --git a/hosts/iron/services/dnsmasq.nix b/hosts/iron/services/dnsmasq.nix
index e96db17..2584fb6 100644
--- a/hosts/iron/services/dnsmasq.nix
+++ b/hosts/iron/services/dnsmasq.nix
@@ -15,6 +15,13 @@ in
       cache-size = 10000;
       dns-forward-max = 1000;
       no-hosts = true;
+      dhcp-host = [
+        "00:30:42:1b:23:ed,192.168.42.59,rfp-01"
+      ];
+      dhcp-option = [
+        "vendor:OpenMobility,10,192.168.42.59"
+        "vendor:OpenMobility,224,OpenMobilitySIP-DECT"
+      ];
       addn-hosts = "${pkgs.writeText "hosts.dnsmasq" ''
         192.168.42.1 aluminium unifi
       ''}";