diff --git a/nixos/modules/system/boot/networkd.nix b/nixos/modules/system/boot/networkd.nix
index bb899c8d8999..7f53efbf83f5 100644
--- a/nixos/modules/system/boot/networkd.nix
+++ b/nixos/modules/system/boot/networkd.nix
@@ -17,11 +17,13 @@ let
           "ManageForeignRoutingPolicyRules"
           "ManageForeignRoutes"
           "RouteTable"
+          "IPv6PrivacyExtensions"
         ])
         (assertValueOneOf "SpeedMeter" boolValues)
         (assertInt "SpeedMeterIntervalSec")
         (assertValueOneOf "ManageForeignRoutingPolicyRules" boolValues)
         (assertValueOneOf "ManageForeignRoutes" boolValues)
+        (assertValueOneOf "IPv6PrivacyExtensions" (boolValues ++ ["prefer-public" "kernel"]))
       ];
 
       sectionDHCPv4 = checkUnitConfig "DHCPv4" [