diff --git a/nixos/modules/services/networking/cjdns.nix b/nixos/modules/services/networking/cjdns.nix
index a10851c1652..d478e45f946 100644
--- a/nixos/modules/services/networking/cjdns.nix
+++ b/nixos/modules/services/networking/cjdns.nix
@@ -260,7 +260,7 @@ in
         RestartSec = 1;
         CapabilityBoundingSet = "CAP_NET_ADMIN CAP_NET_RAW";
         AmbientCapabilities = "CAP_NET_ADMIN CAP_NET_RAW";
-        ProtectSystem = "full";
+        ProtectSystem = true;
         MemoryDenyWriteExecute = true;
         ProtectHome = true;
         PrivateTmp = true;