diff --git a/wp-includes/class-wp-customize-manager.php b/wp-includes/class-wp-customize-manager.php
index ec27563b61..1b2d29dc3b 100644
--- a/wp-includes/class-wp-customize-manager.php
+++ b/wp-includes/class-wp-customize-manager.php
@@ -1577,6 +1577,7 @@ final class WP_Customize_Manager {
 		add_filter( 'wp_redirect', array( $this, 'add_state_query_params' ) );
 
 		wp_enqueue_script( 'customize-preview' );
+		wp_enqueue_style( 'customize-preview' );
 		add_action( 'wp_head', array( $this, 'customize_preview_loading_style' ) );
 		add_action( 'wp_head', array( $this, 'remove_frameless_preview_messenger_channel' ) );
 		add_action( 'wp_footer', array( $this, 'customize_preview_settings' ), 20 );
diff --git a/wp-includes/class-wp-customize-nav-menus.php b/wp-includes/class-wp-customize-nav-menus.php
index 998270271d..e263e3f391 100644
--- a/wp-includes/class-wp-customize-nav-menus.php
+++ b/wp-includes/class-wp-customize-nav-menus.php
@@ -1327,7 +1327,6 @@ final class WP_Customize_Nav_Menus {
 	 */
 	public function customize_preview_enqueue_deps() {
 		wp_enqueue_script( 'customize-preview-nav-menus' ); // Note that we have overridden this.
-		wp_enqueue_style( 'customize-preview' );
 	}
 
 	/**
diff --git a/wp-includes/class-wp-customize-widgets.php b/wp-includes/class-wp-customize-widgets.php
index 4be73e4d81..0cd2359d56 100644
--- a/wp-includes/class-wp-customize-widgets.php
+++ b/wp-includes/class-wp-customize-widgets.php
@@ -1086,7 +1086,6 @@ final class WP_Customize_Widgets {
 	 */
 	public function customize_preview_enqueue() {
 		wp_enqueue_script( 'customize-preview-widgets' );
-		wp_enqueue_style( 'customize-preview' );
 	}
 
 	/**
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 8c2c2126bc..a394476d10 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.8-alpha-39950';
+$wp_version = '4.8-alpha-39951';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.