diff --git a/nixos/modules/nixos/services/bind/default.nix b/nixos/modules/nixos/services/bind/default.nix
index aaac213..4500f3b 100644
--- a/nixos/modules/nixos/services/bind/default.nix
+++ b/nixos/modules/nixos/services/bind/default.nix
@@ -9,7 +9,7 @@ in
     enable = mkEnableOption "bind";
     package = mkPackageOption pkgs "bind" { };
     extraConfig = mkOption {
-      type = types.string;
+      type = types.str;
     };
   };