diff --git a/app/models/category_style_setting.rb b/app/models/category_style_setting.rb
deleted file mode 100644
index e62720ebc04..00000000000
--- a/app/models/category_style_setting.rb
+++ /dev/null
@@ -1,19 +0,0 @@
-# TODO all enums should probably move out of models
-# TODO we should be able to do this kind of stuff without a backing class
-require_dependency 'enum_site_setting'
-
-class CategoryStyleSetting < EnumSiteSetting
-
-  VALUES = ["bar", "box", "bullet"]
-
-  def self.valid_value?(val)
-    VALUES.include?(val)
-  end
-
-  def self.values
-    VALUES.map do |l|
-      {name: l, value: l}
-    end
-  end
-
-end
diff --git a/config/site_settings.yml b/config/site_settings.yml
index 42401150f9d..2bf7eb4369c 100644
--- a/config/site_settings.yml
+++ b/config/site_settings.yml
@@ -12,6 +12,7 @@
 # type: email    - Must be a valid email address.
 # type: username - Must match the username of an existing user.
 # type: list     - A list of values, chosen from a set of valid values defined in the choices option.
+# type: enum     - A single value, chosen from a set of valid values in the choices option.
 #
 # A type:list setting with the word 'colors' in its name will make color values have a bold line of the corresponding color
 #
@@ -147,7 +148,11 @@ basic:
   category_style:
     client: true
     default: 'bullet'
-    enum: 'CategoryStyleSetting'
+    type: enum
+    choices:
+      - bar
+      - box
+      - bullet
     preview: '<span class="badge-wrapper {{value}}"><span class="badge-category-parent-bg" style="background-color: #aaa;"></span><span class="badge-category-bg" style="background-color: #777;"></span><span style="color: #fff;" data-drop-close="true" class="badge-category clear-badge">Category</span></span>'
   enable_mobile_theme:
     client: true
diff --git a/lib/site_setting_extension.rb b/lib/site_setting_extension.rb
index facb22bb4b4..228a7e6f395 100644
--- a/lib/site_setting_extension.rb
+++ b/lib/site_setting_extension.rb
@@ -3,6 +3,11 @@ require_dependency 'site_settings/db_provider'
 
 module SiteSettingExtension
 
+  # For plugins, so they can tell if a feature is supported
+  def supported_types
+    [:email, :username, :list, :enum]
+  end
+
   # part 1 of refactor, centralizing the dependency here
   def provider=(val)
     @provider = val
@@ -171,7 +176,13 @@ module SiteSettingExtension
           category: categories[s],
           preview: previews[s]
         }
-        opts.merge!({valid_values: enum_class(s).values, translate_names: enum_class(s).translate_names?}) if type == :enum
+
+        if type == :enum && enum_class(s)
+          opts.merge!({valid_values: enum_class(s).values, translate_names: enum_class(s).translate_names?})
+        elsif type == :enum
+          opts.merge!({valid_values: choices[s].map{|c| {name: c, value: c}}, translate_names: false})
+        end
+
         opts[:choices] = choices[s] if choices.has_key? s
         opts
       end
@@ -278,7 +289,11 @@ module SiteSettingExtension
     end
 
     if type == types[:enum]
-      raise Discourse::InvalidParameters.new(:value) unless enum_class(name).valid_value?(val)
+      if enum_class(name)
+        raise Discourse::InvalidParameters.new(:value) unless enum_class(name).valid_value?(val)
+      else
+        raise Discourse::InvalidParameters.new(:value) unless choices[name].include?(val)
+      end
     end
 
     if v = validators[name]
@@ -408,7 +423,8 @@ module SiteSettingExtension
       'username'     => UsernameSettingValidator,
       types[:fixnum] => IntegerSettingValidator,
       types[:string] => StringSettingValidator,
-      'list' => StringSettingValidator
+      'list' => StringSettingValidator,
+      'enum' => StringSettingValidator
     }
     @validator_mapping[type_name]
   end