diff --git a/core/modules/help_topics/src/Plugin/HelpTopic/HelpTopicPluginManager.php b/core/modules/help_topics/src/Plugin/HelpTopic/HelpTopicPluginManager.php
index f5e4720d88..e5aab0c96c 100644
--- a/core/modules/help_topics/src/Plugin/HelpTopic/HelpTopicPluginManager.php
+++ b/core/modules/help_topics/src/Plugin/HelpTopic/HelpTopicPluginManager.php
@@ -95,7 +95,7 @@ public function __construct(ModuleHandlerInterface $module_handler, ThemeHandler
    * @param string $plugin_id
    *   The ID of the plugin this definition is being used for.
    */
-  public function processDefinition(array &$definition, $plugin_id) {
+  public function processDefinition(&$definition, $plugin_id) {
     $definition = NestedArray::mergeDeep($this->defaults, $definition);
     $definition['id'] = $plugin_id;
   }