diff --git a/wp-includes/script-loader.php b/wp-includes/script-loader.php
index 1f3ae7bc1e..c64920af9b 100644
--- a/wp-includes/script-loader.php
+++ b/wp-includes/script-loader.php
@@ -882,7 +882,7 @@ function wp_default_styles( &$styles ) {
 	$rtl_styles = array(
 		// wp-admin
 		'common', 'forms', 'admin-menu', 'dashboard', 'list-tables', 'edit', 'revisions', 'media', 'themes', 'about', 'nav-menus',
-		'widgets', 'site-icon', 'l10n', 'install', 'wp-color-picker', 'customize-controls', 'customize-widgets', 'customize-nav-menus',
+		'widgets', 'site-icon', 'l10n', 'install', 'wp-color-picker', 'customize-controls', 'customize-widgets', 'customize-nav-menus', 'customize-preview',
 		'ie', 'login', 'press-this',
 		// wp-includes
 		'buttons', 'admin-bar', 'wp-auth-check', 'editor-buttons', 'media-views', 'wp-pointer',
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 3e20c58dce..b434eb232f 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-beta2-39196';
+$wp_version = '4.7-beta2-39197';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.