diff --git a/src/FacetManager/DefaultFacetManager.php b/src/FacetManager/DefaultFacetManager.php
index dd9e30c..a044f6b 100644
--- a/src/FacetManager/DefaultFacetManager.php
+++ b/src/FacetManager/DefaultFacetManager.php
@@ -327,7 +327,7 @@ class DefaultFacetManager {
     if (empty($facet->getResults())) {
       $empty_behavior = $facet->getEmptyBehavior();
       if ($empty_behavior['behavior'] == 'text') {
-        return ['#markup' => $empty_behavior['text']];
+        return [['#markup' => $empty_behavior['text']]];
       }
       else {
         return [];
@@ -338,7 +338,7 @@ class DefaultFacetManager {
     /** @var \Drupal\facets\Widget\WidgetInterface $widget */
     $widget = $this->widgetPluginManager->createInstance($facet->getWidget());
 
-    return $widget->build($facet);
+    return [$widget->build($facet)];
   }
 
   /**
diff --git a/src/Plugin/Block/FacetBlock.php b/src/Plugin/Block/FacetBlock.php
index 4941b5c..747f636 100644
--- a/src/Plugin/Block/FacetBlock.php
+++ b/src/Plugin/Block/FacetBlock.php
@@ -84,7 +84,7 @@ class FacetBlock extends BlockBase implements ContainerFactoryPluginInterface {
     $facet = $this->facetStorage->load($facet_id);
 
     // Let the facet_manager build the facets.
-    $build = [$this->facetManager->build($facet)];
+    $build = $this->facetManager->build($facet);
 
     // Add contextual links only when we have results.
     if (!empty($build)) {