diff --git a/modules/plugins/utility/binds/which-key/which-key.nix b/modules/plugins/utility/binds/which-key/which-key.nix
index 796dc8e..feb8d76 100644
--- a/modules/plugins/utility/binds/which-key/which-key.nix
+++ b/modules/plugins/utility/binds/which-key/which-key.nix
@@ -4,14 +4,14 @@
   ...
 }: let
   inherit (lib.options) mkEnableOption mkOption;
-  inherit (lib.types) attrsOf str;
+  inherit (lib.types) attrsOf nullOr str;
 in {
   options.vim.binds.whichKey = {
     enable = mkEnableOption "which-key keybind helper menu";
 
     register = mkOption {
       description = "Register label for which-key keybind helper menu";
-      type = attrsOf str;
+      type = attrsOf (nullOr str);
       default = {};
     };
   };