diff --git a/wp-admin/customize.php b/wp-admin/customize.php
index 44654c003f..f1e66ff3dd 100644
--- a/wp-admin/customize.php
+++ b/wp-admin/customize.php
@@ -102,7 +102,7 @@ if ( $wp_customize->is_ios() ) {
 if ( is_rtl() ) {
 	$body_class .= ' rtl';
 }
-$body_class .= ' locale-' . sanitize_html_class( strtolower( str_replace( '_', '-', get_locale() ) ) );
+$body_class .= ' locale-' . sanitize_html_class( strtolower( str_replace( '_', '-', get_user_locale() ) ) );
 
 $admin_title = sprintf( $wp_customize->get_document_title_template(), __( 'Loading…' ) );
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 995937ca02..8451f86520 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.8-alpha-40364';
+$wp_version = '4.8-alpha-40368';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.