diff --git a/wp-includes/class-wp-customize-manager.php b/wp-includes/class-wp-customize-manager.php
index 4929d150ab..c62a0ab8a4 100644
--- a/wp-includes/class-wp-customize-manager.php
+++ b/wp-includes/class-wp-customize-manager.php
@@ -1019,7 +1019,7 @@ final class WP_Customize_Manager {
 		$this->add_control( new WP_Customize_Background_Image_Control( $this ) );
 
 		$this->add_setting( 'background_repeat', array(
-			'default'        => 'repeat',
+			'default'        => get_theme_support( 'custom-background', 'default-repeat' ),
 			'theme_supports' => 'custom-background',
 		) );
 
@@ -1036,7 +1036,7 @@ final class WP_Customize_Manager {
 		) );
 
 		$this->add_setting( 'background_position_x', array(
-			'default'        => 'left',
+			'default'        => get_theme_support( 'custom-background', 'default-position-x' ),
 			'theme_supports' => 'custom-background',
 		) );
 
@@ -1052,7 +1052,7 @@ final class WP_Customize_Manager {
 		) );
 
 		$this->add_setting( 'background_attachment', array(
-			'default'        => 'fixed',
+			'default'        => get_theme_support( 'custom-background', 'default-attachment' ),
 			'theme_supports' => 'custom-background',
 		) );
 
@@ -1061,8 +1061,8 @@ final class WP_Customize_Manager {
 			'section'    => 'background_image',
 			'type'       => 'radio',
 			'choices'    => array(
-				'fixed'      => __('Fixed'),
 				'scroll'     => __('Scroll'),
+				'fixed'      => __('Fixed'),
 			),
 		) );