diff --git a/modules/mount/default.nix b/modules/mount/default.nix
index 31d5c45..310f892 100644
--- a/modules/mount/default.nix
+++ b/modules/mount/default.nix
@@ -1,3 +1,7 @@
+## Mount
+##
+## Mount filesystems
+
 
 { lib, pkgs, config, ...}:
 let
diff --git a/modules/watchdog/default.nix b/modules/watchdog/default.nix
index 738c668..d947954 100644
--- a/modules/watchdog/default.nix
+++ b/modules/watchdog/default.nix
@@ -1,3 +1,9 @@
+## Watchdog
+##
+## Enable hardware watchdog (for devices that support one) and
+## feed it by checking the health of specified critical services.
+## If the watchdog feeder stops, the device will reboot.
+
 { lib, pkgs, config, ...}:
 let
   inherit (lib) mkOption types;