diff --git a/src/Plugin/Block/FacetBlock.php b/src/Plugin/Block/FacetBlock.php
index 747f636..4941b5c 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)) {