diff --git a/framework/console/controllers/AssetController.php b/framework/console/controllers/AssetController.php
index 1977403ed9..a865116f74 100644
--- a/framework/console/controllers/AssetController.php
+++ b/framework/console/controllers/AssetController.php
@@ -10,7 +10,6 @@ namespace yii\console\controllers;
 use Yii;
 use yii\console\Exception;
 use yii\console\Controller;
-use yii\helpers\ArrayHelper;
 use yii\helpers\Console;
 use yii\helpers\FileHelper;
 use yii\helpers\VarDumper;
@@ -332,7 +331,7 @@ class AssetController extends Controller
             if (isset($bundles[$name])) {
                 if (!$this->isBundleExternal($bundles[$name])) {
                     foreach ($bundles[$name]->$type as $file) {
-                        $file = ArrayHelper::toArray($file);
+                        $file = (array) $file;
                         $inputFiles[] = $bundles[$name]->basePath . '/' . $file[0];
                     }
                 }
diff --git a/framework/web/AssetBundle.php b/framework/web/AssetBundle.php
index a40ebc77fc..c5171dc13d 100644
--- a/framework/web/AssetBundle.php
+++ b/framework/web/AssetBundle.php
@@ -152,7 +152,7 @@ class AssetBundle extends Object
             $view->registerJsFile($manager->getAssetUrl($this, $js), $this->jsOptions);
         }
         foreach ($this->css as $css) {
-            $css = ArrayHelper::toArray($css);
+            $css = (array) $css;
             $file = array_shift($css);
             $options = ArrayHelper::merge($this->cssOptions, $css);
             $view->registerCssFile($manager->getAssetUrl($this, $file), $options);
@@ -178,7 +178,7 @@ class AssetBundle extends Object
                 }
             }
             foreach ($this->css as $i => $css) {
-                $css = ArrayHelper::toArray($css);
+                $css = (array) $css;
                 $file = array_shift($css);
                 if (Url::isRelative($file)) {
                     $css = ArrayHelper::merge($this->cssOptions, $css);