diff --git a/core/modules/tracker/tracker.pages.inc b/core/modules/tracker/tracker.pages.inc
index c0077a3..04d70fa 100644
--- a/core/modules/tracker/tracker.pages.inc
+++ b/core/modules/tracker/tracker.pages.inc
@@ -112,7 +112,7 @@ function tracker_page($account = NULL) {
         ),
         'last updated' => array(
           'data' => t('!time ago', array(
-            '!time' => \Drupal::service('date.formatter')->formatInterval(REQUEST_TIME - $node->last_activity),
+            '!time' => \Drupal::service('date.formatter')->formatInterval(REQUEST_TIME - $node->getChangedTime()),
           )),
         ),
       );