diff --git a/lib/carmen/rails/action_view/form_helper.rb b/lib/carmen/rails/action_view/form_helper.rb
index e099a09..9835e4b 100644
--- a/lib/carmen/rails/action_view/form_helper.rb
+++ b/lib/carmen/rails/action_view/form_helper.rb
@@ -45,9 +45,24 @@ def subregion_select(object, method, parent_region_or_code, options={}, html_opt
       #
       #   country_select(@object, :region, {priority: ['US', 'CA']}, class: 'region')
       #
+      # Note that in order to preserve compatibility with various existing
+      # libraries, an alternative API is supported but not recommended:
+      #
+      #   country_select(@object, :region, ['US', 'CA'], class: region)
+      #
       # Returns an `html_safe` string containing the HTML for a select element.
-      def country_select(object, method, options={}, html_options={})
-        tag = InstanceTag.new(object, method, self, options.delete(:object))
+      def country_select(object, method, *args)
+
+        # These contortions are to provide API-compatibility
+        priority_countries = args.shift if args.first.is_a?(Array)
+        options, html_options = args
+
+        options ||= {}
+        options[:priority] = priority_countries if priority_countries
+
+        html_options ||= {}
+
+        tag = InstanceTag.new(object, method, self)
         tag.to_region_select_tag(Carmen::World.instance, options, html_options)
       end
 
@@ -157,7 +172,7 @@ def determine_parent(parent_region_or_code)
     end
 
     class InstanceTag
-      def to_region_select_tag(parent_region, options, html_options)
+      def to_region_select_tag(parent_region, options = {}, html_options = {})
         html_options = html_options.stringify_keys
         add_default_name_and_id(html_options)
         priority_regions = options[:priority] || []
@@ -173,9 +188,8 @@ class FormBuilder
       # web form.
       #
       # See `FormOptionsHelper::country_select` for more information.
-      def country_select(method, options = {}, html_options = {})
-        @template.country_select(@object_name, method,
-                                 options.merge(:object => @object), html_options)
+      def country_select(method, *args)
+        @template.country_select(@object_name, method, *args)
       end
 
       # Generate select and subregion option tags with the provided name. A
@@ -183,9 +197,8 @@ def country_select(method, options = {}, html_options = {})
       # a given country.
       #
       # See `FormOptionsHelper::subregion_select` for more information.
-      def subregion_select(method, parent_region_or_code, options={}, html_options={})
-        @template.subregion_select(@object_name, method, parent_region_or_code,
-                                   options.merge(:object => @object), html_options)
+      def subregion_select(method, parent_region_or_code, *args)
+        @template.subregion_select(@object_name, method, parent_region_or_code, *args)
       end
     end
 
diff --git a/spec/carmen/action_view/helpers/form_helper_spec.rb b/spec/carmen/action_view/helpers/form_helper_spec.rb
index 4553cf3..bc104c1 100644
--- a/spec/carmen/action_view/helpers/form_helper_spec.rb
+++ b/spec/carmen/action_view/helpers/form_helper_spec.rb
@@ -66,6 +66,21 @@ def test_priority_country_select
     assert_equal_markup(expected, html)
   end
 
+  def test_priority_country_select_deprecated_api
+    html = country_select(@object, :country_code, ['ES'], {})
+    expected = <<-HTML
+      <select id="object_country_code" name="object[country_code]">
+        <option value="ES">Eastasia</option>
+        <option disabled>-------------</option>
+        <option value="ES">Eastasia</option>
+        <option value="EU">Eurasia</option>
+        <option value="OC">Oceania</option>
+      </select>
+    HTML
+
+    assert_equal_markup(expected, html)
+  end
+
   def test_basic_subregion_select
     oceania = Carmen::Country.coded('OC')
     expected = <<-HTML
@@ -165,6 +180,38 @@ def test_region_options_for_select_with_array_of_regions_and_priority
     assert_equal_markup(expected, html)
   end
 
+  def test_form_builder_country_select
+    form = ActionView::Helpers::FormBuilder.new(:object, @object, self, {}, ->{})
+
+    html = form.country_select('attribute_name')
+    expected = <<-HTML
+      <select id="object_attribute_name" name="object[attribute_name]">
+        <option value="ES">Eastasia</option>
+        <option value="EU">Eurasia</option>
+        <option value="OC">Oceania</option>
+      </select>
+    HTML
+
+    assert_equal_markup(expected, html)
+  end
+
+  def test_form_builder_country_select_deprecated_api
+    form = ActionView::Helpers::FormBuilder.new(:object, @object, self, {}, ->{})
+
+    html = form.country_select('attribute_name', ['ES'])
+    expected = <<-HTML
+      <select id="object_attribute_name" name="object[attribute_name]">
+        <option value="ES">Eastasia</option>
+        <option disabled>-------------</option>
+        <option value="ES">Eastasia</option>
+        <option value="EU">Eurasia</option>
+        <option value="OC">Oceania</option>
+      </select>
+    HTML
+
+    assert_equal_markup(expected, html)
+  end
+
   def method_missing(method, *args)
     fail "method_missing #{method}"
   end