diff --git a/core/modules/serialization/src/Normalizer/DateTimeNormalizer.php b/core/modules/serialization/src/Normalizer/DateTimeNormalizer.php
index 209d15201b5d20b4f74e3f0dfa6eb94e8b5b50a2..b84e170d6b755f8259448e3e750dd512700d740b 100644
--- a/core/modules/serialization/src/Normalizer/DateTimeNormalizer.php
+++ b/core/modules/serialization/src/Normalizer/DateTimeNormalizer.php
@@ -64,8 +64,6 @@ public function normalize($datetime, $format = NULL, array $context = []) {
       // Set an explicit timezone. Otherwise, timestamps may end up being
       // normalized using the user's preferred timezone. Which would result in
       // many variations and complex caching.
-      // @see \Drupal\Core\Datetime\DrupalDateTime::prepareTimezone()
-      // @see drupal_get_user_timezone()
       ->setTimezone($this->getNormalizationTimezone())
       ->format(\DateTime::RFC3339);
   }
@@ -74,6 +72,7 @@ public function normalize($datetime, $format = NULL, array $context = []) {
    * Gets the timezone to be used during normalization.
    *
    * @see ::normalize
+   * @see \Drupal\Core\Datetime\DrupalDateTime::prepareTimezone()
    *
    * @returns \DateTimeZone
    *   The timezone to use.