diff --git a/core/includes/common.inc b/core/includes/common.inc
index e768bf4..7919e8d 100644
--- a/core/includes/common.inc
+++ b/core/includes/common.inc
@@ -3910,10 +3910,6 @@ function _drupal_bootstrap_code() {
   // Load all enabled modules
   Drupal::moduleHandler()->loadAll();
 
-  // Set our bridge extension manager to Zend Feed.
-  Reader::setExtensionManager(Drupal::service('feed.bridge.reader'));
-  Writer::setExtensionManager(Drupal::service('feed.bridge.writer'));
-
   // Make sure all stream wrappers are registered.
   file_get_stream_wrappers();
 
diff --git a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/aggregator/parser/DefaultParser.php b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/aggregator/parser/DefaultParser.php
index a295749..6ce9f77 100644
--- a/core/modules/aggregator/lib/Drupal/aggregator/Plugin/aggregator/parser/DefaultParser.php
+++ b/core/modules/aggregator/lib/Drupal/aggregator/Plugin/aggregator/parser/DefaultParser.php
@@ -32,6 +32,9 @@ class DefaultParser implements ParserInterface {
    * {@inheritdoc}
    */
   public function parse(Feed $feed) {
+    // Set our bridge extension manager to Zend Feed.
+    Reader::setExtensionManager(Drupal::service('feed.bridge.reader'));
+
     try {
       $channel = Reader::importString($feed->source_string);
     }