diff --git a/nixos/lib/systemd-lib.nix b/nixos/lib/systemd-lib.nix
index fdf5525c5385..b8848f56a6c0 100644
--- a/nixos/lib/systemd-lib.nix
+++ b/nixos/lib/systemd-lib.nix
@@ -579,7 +579,8 @@ in rec {
       '' else "")
        + optionalString (def ? stopIfChanged && !def.stopIfChanged) ''
          X-StopIfChanged=false
-       '' + optionalString (def ? notSocketActivated && def.notSocketActivated) ''
+      ''
+       + optionalString (def ? notSocketActivated && def.notSocketActivated) ''
          X-NotSocketActivated=true
       '' + attrsToSection def.serviceConfig);
     };
diff --git a/nixos/modules/services/hardware/udev.nix b/nixos/modules/services/hardware/udev.nix
index 1ea001fcc26a..f46c845c0848 100644
--- a/nixos/modules/services/hardware/udev.nix
+++ b/nixos/modules/services/hardware/udev.nix
@@ -434,10 +434,9 @@ in
     '';
 
     systemd.services.systemd-udevd = {
-        restartTriggers = [ config.environment.etc."udev/rules.d".source ];
-        notSocketActivated = true;
-      };
-
+      restartTriggers = [ config.environment.etc."udev/rules.d".source ];
+      notSocketActivated = true;
+    };
   };
 
   imports = [