diff --git a/nix/nixos-module/collectd/default.nix b/nix/nixos-module/collectd/default.nix
index feb8c6c..ba74adc 100644
--- a/nix/nixos-module/collectd/default.nix
+++ b/nix/nixos-module/collectd/default.nix
@@ -108,8 +108,8 @@ in
   }) ];
 
 
-  systemd.services.collectd = lib.mkIf {
+  systemd.services.collectd = lib.mkIf config.services.dhcpd4.enable {
     after = [ "dhcpd4.service" ];
-    serviceConfig.StateDirectory = config.services.dhcpd4.enable "dhcpd4";
+    serviceConfig.StateDirectory = "dhcpd4";
   };
 }