diff --git a/src/wp-includes/customize/class-wp-customize-filter-setting.php b/src/wp-includes/customize/class-wp-customize-filter-setting.php
index 605099f2a2..f6551b6019 100644
--- a/src/wp-includes/customize/class-wp-customize-filter-setting.php
+++ b/src/wp-includes/customize/class-wp-customize-filter-setting.php
@@ -19,7 +19,12 @@
 class WP_Customize_Filter_Setting extends WP_Customize_Setting {
 
 	/**
+	 * Saves the value of the setting, using the related API.
+	 *
 	 * @since 3.4.0
+	 * @access public
+	 *
+	 * @param mixed $value The value to update.
 	 */
 	public function update( $value ) {}
 }