diff --git a/core/lib/Drupal/Core/Render/Element/README.txt b/core/lib/Drupal/Core/Render/Element/README.txt
new file mode 100644
index 0000000..21a0b15
--- /dev/null
+++ b/core/lib/Drupal/Core/Render/Element/README.txt
@@ -0,0 +1,2 @@
+@todo This must be here because DrupalKernel is stupid.
+@todo File an issue.