diff --git a/nixos/modules/system/boot/networkd.nix b/nixos/modules/system/boot/networkd.nix
index c091d8630349..f80d5afc55fc 100644
--- a/nixos/modules/system/boot/networkd.nix
+++ b/nixos/modules/system/boot/networkd.nix
@@ -201,7 +201,7 @@ let
     (assertValueOneOf "IPv6AcceptRA" boolValues)
     (assertValueOneOf "IPv4ProxyARP" boolValues)
     (assertValueOneOf "IPv6ProxyNDP" boolValues)
-    (assertValueOneOf "IPv6PrefixDelegation" boolValues)
+    (assertValueOneOf "IPv6PrefixDelegation" (boolValues ++ [ "dhcpv6" "static" ]))
     (assertValueOneOf "ActiveSlave" boolValues)
     (assertValueOneOf "PrimarySlave" boolValues)
     (assertValueOneOf "ConfigureWithoutCarrier" boolValues)