1 files changed, 1 insertions, 1 deletions
diff --git a/core/modules/help/src/HelpTopicTwigLoader.php b/core/modules/help/src/HelpTopicTwigLoader.php
index fc2e61bbaaf..9178166597c 100644
--- a/core/modules/help/src/HelpTopicTwigLoader.php
+++ b/core/modules/help/src/HelpTopicTwigLoader.php
@@ -96,7 +96,7 @@ class HelpTopicTwigLoader extends FilesystemLoader {
   /**
    * {@inheritdoc}
    */
-  protected function findTemplate($name, $throw = TRUE) {
+  protected function findTemplate($name, $throw = TRUE): ?string {
     if (!str_ends_with($name, '.html.twig')) {
       if (!$throw) {
         return NULL;