diff --git a/nixos/servnerr-4/networking.nix b/nixos/servnerr-4/networking.nix
index c35783f..0df8d17 100644
--- a/nixos/servnerr-4/networking.nix
+++ b/nixos/servnerr-4/networking.nix
@@ -40,6 +40,7 @@
       enable = false;
       matchConfig.Name = "tengb0";
       networkConfig.DHCP = "ipv4";
+      dhcpV4Config.ClientIdentifier = "mac";
     };
   };
 }