diff --git a/core/lib/Drupal/Core/Routing/Enhancer/RequestFormatEnhancer.php b/core/lib/Drupal/Core/Routing/Enhancer/RequestFormatEnhancer.php
index 5e7be47..36861b0 100644
--- a/core/lib/Drupal/Core/Routing/Enhancer/RequestFormatEnhancer.php
+++ b/core/lib/Drupal/Core/Routing/Enhancer/RequestFormatEnhancer.php
@@ -14,15 +14,16 @@
 /**
  * Sets the format of the Request based on the route information.
  *
- * In this case we are modifying the request, not the route data, but it
- * is the most logical place to set this value.
+ * In this case we are modifying the request, not the route data, but it is the
+ * most logical place to set this value, because other Enhancers rely on it, so
+ * this class has a high priority defined to run before the other ones.
  */
 class RequestFormatEnhancer implements RouteEnhancerInterface {
 
   /**
    * Content negotiation library.
    *
-   * @var \Drupal\CoreContentNegotiation
+   * @var \Drupal\Core\ContentNegotiation
    */
   protected $negotiation;