diff --git a/wp-includes/class-wp-customize-control.php b/wp-includes/class-wp-customize-control.php
index 3541ebf98d..7506a500df 100644
--- a/wp-includes/class-wp-customize-control.php
+++ b/wp-includes/class-wp-customize-control.php
@@ -87,7 +87,7 @@ class WP_Customize_Control {
 	 * @param string $id
 	 * @param array $args
 	 */
-	function __construct( $manager, $id, $args = array() ) {
+	public function __construct( $manager, $id, $args = array() ) {
 		$keys = array_keys( get_object_vars( $this ) );
 		foreach ( $keys as $key ) {
 			if ( isset( $args[ $key ] ) )
diff --git a/wp-includes/class-wp-customize-manager.php b/wp-includes/class-wp-customize-manager.php
index 8ed4e699a5..eeb4fdc100 100644
--- a/wp-includes/class-wp-customize-manager.php
+++ b/wp-includes/class-wp-customize-manager.php
@@ -190,7 +190,7 @@ final class WP_Customize_Manager {
 	 *
 	 * @since 3.4.0
 	 */
-	function after_setup_theme() {
+	public function after_setup_theme() {
 		if ( ! $this->doing_ajax() && ! validate_current_theme() ) {
 			wp_redirect( 'themes.php?broken=true' );
 			exit;
diff --git a/wp-includes/class-wp-customize-section.php b/wp-includes/class-wp-customize-section.php
index e96f3865e7..2a9214f19e 100644
--- a/wp-includes/class-wp-customize-section.php
+++ b/wp-includes/class-wp-customize-section.php
@@ -93,7 +93,7 @@ class WP_Customize_Section {
 	 * @param string               $id      An specific ID of the section.
 	 * @param array                $args    Section arguments.
 	 */
-	function __construct( $manager, $id, $args = array() ) {
+	public function __construct( $manager, $id, $args = array() ) {
 		$keys = array_keys( get_class_vars( __CLASS__ ) );
 		foreach ( $keys as $key ) {
 			if ( isset( $args[ $key ] ) )
diff --git a/wp-includes/class-wp-customize-setting.php b/wp-includes/class-wp-customize-setting.php
index c8678738b8..4bca44252e 100644
--- a/wp-includes/class-wp-customize-setting.php
+++ b/wp-includes/class-wp-customize-setting.php
@@ -75,7 +75,7 @@ class WP_Customize_Setting {
 	 * @param array                $args    Setting arguments.
 	 * @return WP_Customize_Setting $setting
 	 */
-	function __construct( $manager, $id, $args = array() ) {
+	public function __construct( $manager, $id, $args = array() ) {
 		$keys = array_keys( get_class_vars( __CLASS__ ) );
 		foreach ( $keys as $key ) {
 			if ( isset( $args[ $key ] ) )