diff --git a/wp-includes/class-wp-customize-control.php b/wp-includes/class-wp-customize-control.php
index f972b1d27c..600fe158f4 100644
--- a/wp-includes/class-wp-customize-control.php
+++ b/wp-includes/class-wp-customize-control.php
@@ -1447,7 +1447,7 @@ class WP_Customize_Nav_Menu_Control extends WP_Customize_Control {
 	 */
 	public function content_template() {
 		?>
-		<button type="button" class="button-secondary add-new-menu-item" aria-expanded="false" aria-controls="available-menu-items">
+		<button type="button" class="button-secondary add-new-menu-item" aria-label="<?php esc_attr_e( 'Add or remove menu items' ); ?>" aria-expanded="false" aria-controls="available-menu-items">
 			<?php _e( 'Add Items' ); ?>
 		</button>
 		<button type="button" class="not-a-button reorder-toggle">
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 4622c81faa..55528d7364 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.3-alpha-32980';
+$wp_version = '4.3-alpha-32981';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.