diff --git a/core/modules/tour/src/Plugin/HelpSection/TourHelpSection.php b/core/modules/tour/src/Plugin/HelpSection/TourHelpSection.php
index c12f58a..fc6f053 100644
--- a/core/modules/tour/src/Plugin/HelpSection/TourHelpSection.php
+++ b/core/modules/tour/src/Plugin/HelpSection/TourHelpSection.php
@@ -105,6 +105,8 @@ public function listTopics() {
             continue;
           }
 
+          // Add flag to automatically start tour, when page is opened.
+          $url->setRouteParameter('tour', 1);
           // Generate the link HTML directly, using toString(), to catch
           // missing parameter exceptions now instead of at render time.
           $topics[$id] = Link::fromTextAndUrl($title, $url)->toString();