diff --git a/core/modules/media_library/src/Plugin/Field/FieldWidget/MediaLibraryWidget.php b/core/modules/media_library/src/Plugin/Field/FieldWidget/MediaLibraryWidget.php
index 017c99e65b..3f341f54b0 100644
--- a/core/modules/media_library/src/Plugin/Field/FieldWidget/MediaLibraryWidget.php
+++ b/core/modules/media_library/src/Plugin/Field/FieldWidget/MediaLibraryWidget.php
@@ -305,7 +305,8 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
     $element += [
       '#type' => 'fieldset',
       '#cardinality' => $this->fieldDefinition->getFieldStorageDefinition()->getCardinality(),
-      '#target_bundles' => $settings['target_bundles'] ?? FALSE,
+      // If no target bundles are specified, all target bundles are allowed.
+      '#target_bundles' => $settings['target_bundles'] ?? [],
       '#attributes' => [
         'id' => $wrapper_id,
         'class' => ['js-media-library-widget'],