diff --git a/src/Plugin/facets/query_type/SearchApiString.php b/src/Plugin/facets/query_type/SearchApiString.php
index e44b037..eb2a484 100644
--- a/src/Plugin/facets/query_type/SearchApiString.php
+++ b/src/Plugin/facets/query_type/SearchApiString.php
@@ -41,26 +41,33 @@ class SearchApiString extends QueryTypePluginBase {
   public function execute() {
     $query = $this->query;
 
-    $unfiltered_results = array();
+    $unfiltered_results = [];
 
-    // Alter the query here.
+    // Only alter the query when there's an actual query object to alter.
     if (!empty($query)) {
       $operator = $this->facet->getQueryOperator();
       $field_identifier = $this->facet->getFieldIdentifier();
 
-      $query2 = $query;
-      $options2 = &$query2->getOptions();
-      $options2['search_api_facets'][$field_identifier] = array(
+      // Copy the query object so we can do an unfiltered query. We need to have
+      // this unfiltered results to make sure that the count of a facet is
+      // correct. The unfiltered results get returned to the facet manager, the
+      // facet manager will save it on facet::unfiltered_results.
+      $unfiltered_query = $query;
+      $unfiltered_options = &$unfiltered_query->getOptions();
+      $unfiltered_options['search_api_facets'][$field_identifier] = array(
         'field' => $field_identifier,
         'limit' => 50,
         'operator' => 'and',
         'min_count' => 0,
         'missing' => FALSE,
       );
-      $unfiltered_results = $query2->execute()->getExtraData('search_api_facets');
+      $unfiltered_results = $unfiltered_query
+        ->execute()
+        ->getExtraData('search_api_facets');
 
-      $options = &$query->getOptions();
 
+      // Set the options for the actual query.
+      $options = &$query->getOptions();
       $options['search_api_facets'][$field_identifier] = array(
         'field' => $field_identifier,
         'limit' => 50,