diff --git a/modules/system/defaults/finder.nix b/modules/system/defaults/finder.nix
index 91e100a0..87fcca39 100644
--- a/modules/system/defaults/finder.nix
+++ b/modules/system/defaults/finder.nix
@@ -5,6 +5,14 @@ with lib;
 {
   options = {
 
+    system.defaults.finder.AppleShowAllFiles = mkOption {
+      type = types.nullOr types.bool;
+      default = null;
+      description = ''
+        Whether to always show hidden files. The default is false.
+      '';
+    };
+
     system.defaults.finder.AppleShowAllExtensions = mkOption {
       type = types.nullOr types.bool;
       default = null;