diff --git a/core/modules/aggregator/aggregator.install b/core/modules/aggregator/aggregator.install
index 894814c..5edc503 100644
--- a/core/modules/aggregator/aggregator.install
+++ b/core/modules/aggregator/aggregator.install
@@ -47,8 +47,8 @@ function aggregator_update_8001() {
  * Make the 'Source feed' field for aggregator items required.
  */
 function aggregator_update_8200() {
-  // An empty update function like aggregator_update_8001() is not enough, we
-  // need to actually set the base field definition as required.
+  // aggregator_update_8001() did not update the last installed field storage
+  // definition for the aggregator item's 'Source feed' field.
   $definition_update_manager = \Drupal::entityDefinitionUpdateManager();
   $field_definition = $definition_update_manager->getFieldStorageDefinition('fid', 'aggregator_item');
   $field_definition->setRequired(TRUE);