diff --git a/docs/apis/subsystems/task/adhoc.md b/docs/apis/subsystems/task/adhoc.md
index 8c95efdb14..6b1f3e1071 100644
--- a/docs/apis/subsystems/task/adhoc.md
+++ b/docs/apis/subsystems/task/adhoc.md
@@ -67,7 +67,7 @@ class do_something extends \core\task\adhoc_task {
     public static function instance(
         int $id,
         string $status,
-    ): void {
+    ): self {
         $task = new self();
         $task->set_custom_data((object) [
             'id' => $id,