diff --git a/modules/system/defaults/NSGlobalDomain.nix b/modules/system/defaults/NSGlobalDomain.nix
index 01e7a459..b68bdf1d 100644
--- a/modules/system/defaults/NSGlobalDomain.nix
+++ b/modules/system/defaults/NSGlobalDomain.nix
@@ -56,7 +56,7 @@ in {
     };
 
     system.defaults.NSGlobalDomain.AppleKeyboardUIMode = mkOption {
-      type = types.nullOr (types.enum [ 3 ]);
+      type = types.nullOr (types.enum [ 2 3 ]);
       default = null;
       description = ''
         Configures the keyboard control behavior.  Mode 3 enables full keyboard control.