diff --git a/phpBB/includes/functions.php b/phpBB/includes/functions.php
index 3e89769234..84de408eb9 100644
--- a/phpBB/includes/functions.php
+++ b/phpBB/includes/functions.php
@@ -3102,7 +3102,7 @@ function page_footer()
 
 		if ($cron_type)
 		{
-			$template->assign_var('RUN_CRON_TASK', '<img src="' . $phpbb_root_path . 'cron.' . $phpEx . '?cron_type=' . $cron_type . '" width="1" height="1" />');
+			$template->assign_var('RUN_CRON_TASK', '<img src="' . $phpbb_root_path . 'cron.' . $phpEx . '?cron_type=' . $cron_type . '" width="1" height="1" alt="cron" />');
 		}
 	}