diff --git a/src/Plugin/facets/processor/SortProcessorHandler.php b/src/Plugin/facets/processor/SortProcessorHandler.php
index c4bcd34..56d3a66 100644
--- a/src/Plugin/facets/processor/SortProcessorHandler.php
+++ b/src/Plugin/facets/processor/SortProcessorHandler.php
@@ -11,6 +11,7 @@
 use Drupal\facets\FacetInterface;
 use Drupal\facets\Processor\BuildProcessorInterface;
 use Drupal\facets\Processor\ProcessorPluginBase;
+use Drupal\facets\Result\Result;

 /**
  * The sort processor handler to manager the sorting.
@@ -35,6 +36,11 @@ class SortProcessorHandler extends ProcessorPluginBase implements BuildProcessor
   protected $facet;

   /**
+   * The sorts enabled for facet.
+   */
+  protected $sorts = [];
+
+  /**
    * {@inheritdoc}
    */
   public function __construct(array $configuration, $plugin_id, array $plugin_definition) {
@@ -46,6 +52,7 @@ public function __construct(array $configuration, $plugin_id, array $plugin_defi

     /** @var \Drupal\facets\FacetInterface $facet */
     $this->facet = $configuration['facet'];
+
   }

   /**
@@ -61,13 +68,26 @@ public function build(FacetInterface $facet, array $results) {
     foreach ($configs as $id => $sort_config) {
       if ($sort_config['status'] == TRUE) {
         /** @var \Drupal\facets\SortProcessor\SortProcessorInterface $sort */
-        $sort = $plugin_manager->createInstance($id, $sort_config);
-        $results = $sort->sortResults($results, $sort_config['sort']);
-        return $results;
+        $this->sorts[] = $plugin_manager->createInstance($id, $sort_config);
       }
     }

+    uasort($results, array($this, 'sortCallback'));
+
     return $results;
   }

+  /**
+   * Applies sorts and return the sorting information for uasort().
+   */
+  protected function sortCallback(Result $a, Result $b) {
+    $return = 0;
+    foreach ($this->sorts as $sort) {
+      if ($return = $sort->sortResults($a, $b)) {
+        break;
+      }
+    }
+    return $return;
+  }
+
 }
diff --git a/src/Plugin/facets/sort_processor/ActiveWidgetOrderProcessor.php b/src/Plugin/facets/sort_processor/ActiveWidgetOrderProcessor.php
index 5d24b55..76bbf72 100644
--- a/src/Plugin/facets/sort_processor/ActiveWidgetOrderProcessor.php
+++ b/src/Plugin/facets/sort_processor/ActiveWidgetOrderProcessor.php
@@ -27,15 +27,18 @@ class ActiveWidgetOrderProcessor extends SortProcessorPluginBase {
   /**
    * {@inheritdoc}
    */
-  public function sortResults(array $results, $order = 'ASC') {
+  public function sortResults(Result $a, Result $b) {
+
+    $order = $this->getConfiguration()['sort'];
+
     if ($order === 'ASC') {
-      usort($results, 'self::sortActiveAsc');
+      return self::sortActiveAsc($a, $b);
     }
     else {
-      usort($results, 'self::sortActiveDesc');
+      return self::sortActiveDesc($a, $b);
     }

-    return $results;
+    return 0;
   }

   /**
diff --git a/src/Plugin/facets/sort_processor/CountWidgetOrderProcessor.php b/src/Plugin/facets/sort_processor/CountWidgetOrderProcessor.php
index 0ea9f8c..b24d16c 100644
--- a/src/Plugin/facets/sort_processor/CountWidgetOrderProcessor.php
+++ b/src/Plugin/facets/sort_processor/CountWidgetOrderProcessor.php
@@ -27,15 +27,18 @@ class CountWidgetOrderProcessor extends SortProcessorPluginBase {
   /**
    * {@inheritdoc}
    */
-  public function sortResults(array $results, $order = 'ASC') {
+  public function sortResults(Result $a, Result $b) {
+
+    $order = $this->getConfiguration()['sort'];
+
     if ($order === 'ASC') {
-      usort($results, 'self::sortCountAsc');
+      return self::sortCountAsc($a, $b);
     }
     else {
-      usort($results, 'self::sortCountDesc');
+      return self::sortCountDesc($a, $b);
     }

-    return $results;
+    return 0;
   }

   /**
diff --git a/src/Plugin/facets/sort_processor/DisplayValueWidgetOrderProcessor.php b/src/Plugin/facets/sort_processor/DisplayValueWidgetOrderProcessor.php
index 9825dbf..25d92b0 100644
--- a/src/Plugin/facets/sort_processor/DisplayValueWidgetOrderProcessor.php
+++ b/src/Plugin/facets/sort_processor/DisplayValueWidgetOrderProcessor.php
@@ -27,15 +27,18 @@ class DisplayValueWidgetOrderProcessor extends SortProcessorPluginBase {
   /**
    * {@inheritdoc}
    */
-  public function sortResults(array $results, $order = 'ASC') {
+  public function sortResults(Result $a, Result $b) {
+
+    $order = $this->getConfiguration()['sort'];
+
     if ($order === 'ASC') {
-      usort($results, 'self::sortDisplayValueAsc');
+      return self::sortDisplayValueAsc($a, $b);
     }
     else {
-      usort($results, 'self::sortDisplayValueDesc');
+      return self::sortDisplayValueDesc($a, $b);
     }

-    return $results;
+    return 0;
   }

   /**
diff --git a/src/Plugin/facets/sort_processor/RawValueWidgetOrderProcessor.php b/src/Plugin/facets/sort_processor/RawValueWidgetOrderProcessor.php
index da345ae..bd11443 100644
--- a/src/Plugin/facets/sort_processor/RawValueWidgetOrderProcessor.php
+++ b/src/Plugin/facets/sort_processor/RawValueWidgetOrderProcessor.php
@@ -27,15 +27,18 @@ class RawValueWidgetOrderProcessor extends SortProcessorPluginBase {
   /**
    * {@inheritdoc}
    */
-  public function sortResults(array $results, $order = 'ASC') {
+  public function sortResults(Result $a, Result $b) {
+
+    $order = $this->getConfiguration()['sort'];
+
     if ($order === 'ASC') {
-      usort($results, 'self::sortRawValueAsc');
+      return self::sortRawValueAsc($a, $b);
     }
     else {
-      usort($results, 'self::sortRawValueDesc');
+      return self::sortRawValueDesc($a, $b);
     }

-    return $results;
+    return 0;
   }

   /**
diff --git a/src/SortProcessor/SortProcessorInterface.php b/src/SortProcessor/SortProcessorInterface.php
index cf6109f..fcd4e56 100644
--- a/src/SortProcessor/SortProcessorInterface.php
+++ b/src/SortProcessor/SortProcessorInterface.php
@@ -6,6 +6,8 @@

 namespace Drupal\facets\SortProcessor;

+use Drupal\facets\Result\Result;
+
 /**
  * Interface SortProcessorInterface.
  *
@@ -18,17 +20,16 @@


   /**
-   * Orders results and return the new order of results.
+   * Compares results and returns the result for uasort().
    *
-   * @param \Drupal\facets\Result\Result[] $results
+   * @param \Drupal\facets\Result\Result $a
    *   An array containing results.
-   * @param string $order
-   *   A string denoting the order in which we should sort, either 'ASC' or
-   *   'DESC'.
+   * @param \Drupal\facets\Result\Result $b
+   *   Second result item for comparison.
    *
-   * @return \Drupal\facets\Result\Result[]
-   *   The same array that was passed in, ordered by $order
+   * @return int
+   *   The comparison result for uasort().
    */
-  public function sortResults(array $results, $order = 'ASC');
+  public function sortResults(Result $a, Result $b);

 }