diff --git a/src/wp-includes/class-wp-admin-bar.php b/src/wp-includes/class-wp-admin-bar.php
index 49986ac225..7bb4881ece 100644
--- a/src/wp-includes/class-wp-admin-bar.php
+++ b/src/wp-includes/class-wp-admin-bar.php
@@ -556,6 +556,13 @@ class WP_Admin_Bar {
 	}
 
 	/**
+	 * Renders toolbar items recursively.
+	 *
+	 * @since 3.1.0
+	 * @deprecated 3.3.0 Use WP_Admin_Bar::_render_item() or WP_Admin_bar::render() instead.
+	 * @see WP_Admin_Bar::_render_item()
+	 * @see WP_Admin_Bar::render()
+	 *
 	 * @param string $id    Unused.
 	 * @param object $node
 	 */