diff --git a/modules/nixos/services.nix b/modules/nixos/services.nix
index 545072b..8933225 100644
--- a/modules/nixos/services.nix
+++ b/modules/nixos/services.nix
@@ -1,6 +1,7 @@
 { config, lib, pkgs, ... }:
 
 {
+  # list of enabled services on the system
   services = {
     tuned.enable = true;
     upower.enable = true;