diff --git a/core/modules/toolbar/src/Element/Toolbar.php b/core/modules/toolbar/src/Element/Toolbar.php
index bf73b8a..ef3ed54 100644
--- a/core/modules/toolbar/src/Element/Toolbar.php
+++ b/core/modules/toolbar/src/Element/Toolbar.php
@@ -12,7 +12,8 @@
 /**
  * Provides a render element for the default Drupal toolbar.
  *
- * @RenderElement("toolbar")
+ * @todo Annotate once https://www.drupal.org/node/2326409 is in.
+ *   RenderElement("toolbar")
  */
 class Toolbar extends RenderElement {
 
diff --git a/core/modules/toolbar/src/Element/ToolbarItem.php b/core/modules/toolbar/src/Element/ToolbarItem.php
index f67c5ab..0591bb2 100644
--- a/core/modules/toolbar/src/Element/ToolbarItem.php
+++ b/core/modules/toolbar/src/Element/ToolbarItem.php
@@ -14,7 +14,8 @@
  *
  * The 'tray' property contains a renderable array.
  *
- * @RenderElement("toolbar_item")
+ * @todo Annotate once https://www.drupal.org/node/2326409 is in.
+ *   RenderElement("toolbar_item")
  */
 class ToolbarItem extends RenderElement {