diff --git a/lib/simple_form/inputs/boolean_input.rb b/lib/simple_form/inputs/boolean_input.rb
index 8dfb29fb..8b52d85a 100644
--- a/lib/simple_form/inputs/boolean_input.rb
+++ b/lib/simple_form/inputs/boolean_input.rb
@@ -60,7 +60,7 @@ module SimpleForm
       # we need the hidden field to be *outside* the label (otherwise it
       # generates invalid html - html5 only).
       def build_hidden_field_for_checkbox
-        return "" unless include_hidden?
+        return "" if !include_hidden? || !unchecked_value
         options = { value: unchecked_value, id: nil, disabled: input_html_options[:disabled] }
         options[:name] = input_html_options[:name] if input_html_options.has_key?(:name)
 
diff --git a/test/inputs/boolean_input_test.rb b/test/inputs/boolean_input_test.rb
index fa50170c..f0398dec 100644
--- a/test/inputs/boolean_input_test.rb
+++ b/test/inputs/boolean_input_test.rb
@@ -146,6 +146,14 @@ class BooleanInputTest < ActionView::TestCase
     end
   end
 
+  test 'input with nested style does not include hidden field when unchecked_value is false' do
+    swap SimpleForm, boolean_style: :nested do
+      with_input_for @user, :active, :boolean, unchecked_value: false
+      assert_select "label.boolean > input.boolean"
+      assert_no_select "input[type=hidden] + label.boolean"
+    end
+  end
+
   test 'input boolean works using :input only in wrapper config (no label_input)' do
     swap_wrapper do
       with_input_for @user, :active, :boolean