diff --git a/actionview/lib/action_view/helpers/tags/select.rb b/actionview/lib/action_view/helpers/tags/select.rb
index 33c9b77d8d..dec19bcfd2 100644
--- a/actionview/lib/action_view/helpers/tags/select.rb
+++ b/actionview/lib/action_view/helpers/tags/select.rb
@@ -15,7 +15,7 @@ module ActionView
 
         def render
           option_tags_options = {
-            selected: @options.fetch(:selected) { value.to_s },
+            selected: @options.fetch(:selected) { value.nil? ? "" : value },
             disabled: @options[:disabled]
           }
 
diff --git a/actionview/test/template/form_options_helper_test.rb b/actionview/test/template/form_options_helper_test.rb
index a27f039994..952f05b7ec 100644
--- a/actionview/test/template/form_options_helper_test.rb
+++ b/actionview/test/template/form_options_helper_test.rb
@@ -851,6 +851,15 @@ class FormOptionsHelperTest < ActionView::TestCase
     )
   end
 
+  def test_select_with_array
+    @continent = Continent.new
+    @continent.countries = ["Africa", "Europe"]
+    assert_dom_equal(
+      %(<select name="continent[countries]" id="continent_countries"><option selected="selected" value="Africa">Africa</option>\n<option selected="selected" value="Europe">Europe</option>\n<option value="America">America</option></select>),
+      select("continent", "countries", %W(Africa Europe America), { multiple: true })
+    )
+  end
+
   def test_required_select
     assert_dom_equal(
       %(<select id="post_category" name="post[category]" required="required"><option value="" label=" "></option>\n<option value="abe">abe</option>\n<option value="mus">mus</option>\n<option value="hest">hest</option></select>),