diff --git a/docs/cookbook/admin_panel/grids.md b/docs/cookbook/admin_panel/grids.md
index 7a455dba..bf8e1081 100644
--- a/docs/cookbook/admin_panel/grids.md
+++ b/docs/cookbook/admin_panel/grids.md
@@ -320,6 +320,7 @@ final class TalkGrid extends AbstractGrid
             ->addFilter(
                 Filter::create(name: 'speaker', type: SpeakerFilter::class)
                     ->setLabel('app.ui.speaker')
+                    ->setOptions(['fields' => ['speaker.id']])
             );
             
             // ...