diff --git a/nixos/modules/system/boot/networkd.nix b/nixos/modules/system/boot/networkd.nix
index ef037b816156..e2dafe2a1715 100644
--- a/nixos/modules/system/boot/networkd.nix
+++ b/nixos/modules/system/boot/networkd.nix
@@ -1281,7 +1281,7 @@ let
         (assertValueOneOf "EmitRouter" boolValues)
         (assertValueOneOf "EmitTimezone" boolValues)
         (assertValueOneOf "BindToInterface" boolValues)
-        (assertValueOneOf "PersistLeases" boolValues)
+        (assertValueOneOf "PersistLeases" boolValues ++ [ "runtime" ])
       ];
 
       sectionIPv6SendRA = checkUnitConfig "IPv6SendRA" [