diff --git a/hosts/fw.cloonar.com/modules/dhcp4.nix b/hosts/fw.cloonar.com/modules/dhcp4.nix
index 5a15b4d..820be46 100644
--- a/hosts/fw.cloonar.com/modules/dhcp4.nix
+++ b/hosts/fw.cloonar.com/modules/dhcp4.nix
@@ -17,6 +17,10 @@
         persist = true;
         type = "memfile";
       };
+      dhcp-ddns = {
+        qualifying-suffix = "cloonar.com.";
+        replace-client-name = "when-not-present";
+      };
       rebind-timer = 2000;
       renew-timer = 1000;
       subnet4 = [