diff --git a/nixos/modules/system/boot/networkd.nix b/nixos/modules/system/boot/networkd.nix
index 3ca43a75c26f..721080949e06 100644
--- a/nixos/modules/system/boot/networkd.nix
+++ b/nixos/modules/system/boot/networkd.nix
@@ -302,7 +302,7 @@ let
 
   checkDhcpV6 = checkUnitConfig "DHCPv6" [
     (assertOnlyFields [
-      "UseDns" "UseNTP" "RapidCommit" "ForceDHCPv6PDOtherInformation"
+      "UseDNS" "UseNTP" "RapidCommit" "ForceDHCPv6PDOtherInformation"
       "PrefixDelegationHint"
     ])
     (assertValueOneOf "UseDNS" boolValues)