diff --git a/app/controllers/object_manager_attributes_controller.rb b/app/controllers/object_manager_attributes_controller.rb
index fb563e9b0..34361f174 100644
--- a/app/controllers/object_manager_attributes_controller.rb
+++ b/app/controllers/object_manager_attributes_controller.rb
@@ -107,6 +107,11 @@ class ObjectManagerAttributesController < ApplicationController
         if params[:data_option][:options][:true]
           params[:data_option][:options][true] = params[:data_option][:options].delete(:true)
         end
+        if params[:data_option][:default] == 'true'
+          params[:data_option][:default] = true
+        elsif params[:data_option][:default] == 'false'
+          params[:data_option][:default] = false
+        end
         # rubocop:enable Lint/BooleanSymbol
       end
     end
diff --git a/test/controllers/object_manager_attributes_controller_test.rb b/test/controllers/object_manager_attributes_controller_test.rb
new file mode 100644
index 000000000..7888b8b98
--- /dev/null
+++ b/test/controllers/object_manager_attributes_controller_test.rb
@@ -0,0 +1,36 @@
+require 'test_helper'
+
+class ObjectManagerAttributesControllerTest < ActionDispatch::IntegrationTest
+  setup do
+
+    # set accept header
+    @headers = { 'ACCEPT' => 'application/json', 'CONTENT_TYPE' => 'application/json' }
+
+    # create agent
+    roles  = Role.where(name: 'Admin')
+    groups = Group.all
+
+    UserInfo.current_user_id = 1
+    @admin = User.create_or_update(
+      login: 'tickets-admin',
+      firstname: 'Tickets',
+      lastname: 'Admin',
+      email: 'tickets-admin@example.com',
+      password: 'adminpw',
+      active: true,
+      roles: roles,
+      groups: groups,
+    )
+  end
+  test '01 converts string to boolean for default value for boolean data type' do
+    credentials = ActionController::HttpAuthentication::Basic.encode_credentials('tickets-admin@example.com', 'adminpw')
+
+    post '/api/v1/object_manager_attributes', params: { 'name' => 'customdescription2', 'object' => 'Ticket', 'display' => 'custom description 2', 'active' => true, 'data_type' => 'boolean', 'data_option' => { 'options' => { 'true' => '', 'false' => '' }, 'default' => 'true' }, 'screens' => { 'create_middle' => { 'ticket.customer' => { 'shown' => true, 'item_class' => 'column' }, 'ticket.agent' => { 'shown' => true, 'item_class' => 'column' } }, 'edit' => { 'ticket.customer' => { 'shown' => true }, 'ticket.agent' => { 'shown' => true } } }, 'id' => 'c-192' }.to_json, headers: @headers.merge('Authorization' => credentials)
+    assert_response :success
+    result = JSON.parse @response.body
+    object = ObjectManager::Attribute.find result['id']
+    assert_equal true, object.data_option['default']
+    assert_equal 'boolean', object.data_type
+    object.destroy
+  end
+end