diff --git a/core/lib/Drupal/Core/Extension/ModuleHandler.php b/core/lib/Drupal/Core/Extension/ModuleHandler.php
index 2a2113ff13..4e0bf9bfea 100644
--- a/core/lib/Drupal/Core/Extension/ModuleHandler.php
+++ b/core/lib/Drupal/Core/Extension/ModuleHandler.php
@@ -777,6 +777,8 @@ public function getModuleDirectories() {
    * {@inheritdoc}
    */
   public function getName($module) {
+    @trigger_error('getName($module) is deprecated in Drupal 8.6.x and will be removed before Drupal 9.0.0. Use \Drupal\Core\Extension\ModuleExtensionList::getName($module). See https://www.drupal.org/node/2709919.', E_USER_DEPRECATED);
+    \Drupal::service('extension.list.module')->getName($module);
     return \Drupal::service('extension.list.module')->getName($module);
   }
 
diff --git a/core/lib/Drupal/Core/Extension/ModuleHandlerInterface.php b/core/lib/Drupal/Core/Extension/ModuleHandlerInterface.php
index 725433bfc5..0c4d16a4f8 100644
--- a/core/lib/Drupal/Core/Extension/ModuleHandlerInterface.php
+++ b/core/lib/Drupal/Core/Extension/ModuleHandlerInterface.php
@@ -401,9 +401,6 @@ public function getModuleDirectories();
    *   Returns the human readable name of the module or the machine name passed
    *   in if no matching module is found.
    */
-  public function getName($module) {
-    @trigger_error('getName($module) is deprecated in Drupal 8.6.x and will be removed before Drupal 9.0.0. Use \Drupal\Core\Extension\ModuleExtensionList::getName($module). See https://www.drupal.org/node/2709919.', E_USER_DEPRECATED);
-    \Drupal::service('extension.list.module')->getName($module);
-  }
+  public function getName($module);
 
 }