diff --git a/core/modules/filter/src/FilterProcessResult.php b/core/modules/filter/src/FilterProcessResult.php
index c07b9a3..deb427e 100644
--- a/core/modules/filter/src/FilterProcessResult.php
+++ b/core/modules/filter/src/FilterProcessResult.php
@@ -7,6 +7,8 @@
 
 namespace Drupal\filter;
 
+use Drupal\Component\Utility\NestedArray;
+
 /**
  * Used to return values from a text filter plugin's processing method.
  *
@@ -153,7 +155,7 @@ public function getCacheTags() {
    * @return $this
    */
   public function addCacheTags(array $cache_tags) {
-    $this->cacheTags = NestedArray::mergeDeepArray($this->cacheTags, $cache_tags);
+    $this->cacheTags = NestedArray::mergeDeep($this->cacheTags, $cache_tags);
     return $this;
   }
 
@@ -188,7 +190,7 @@ public function getAssets() {
    * @return $this
    */
   public function addAssets(array $assets) {
-    $this->assets = NestedArray::mergeDeepArray($this->assets, $assets);
+    $this->assets = NestedArray::mergeDeep($this->assets, $assets);
     return $this;
   }