diff --git a/framework/base/ErrorHandler.php b/framework/base/ErrorHandler.php
index d576b9feef..606a795cfa 100644
--- a/framework/base/ErrorHandler.php
+++ b/framework/base/ErrorHandler.php
@@ -93,10 +93,10 @@ class ErrorHandler extends Component
 			return;
 		}
 
-		$useErrorView = $response->format === \yii\web\Response::FORMAT_HTML && (!YII_DEBUG || $exception instanceof UserException);
-
 		$response = Yii::$app->getResponse();
 
+		$useErrorView = $response->format === \yii\web\Response::FORMAT_HTML && (!YII_DEBUG || $exception instanceof UserException);
+
 		if ($useErrorView && $this->errorAction !== null) {
 			$result = Yii::$app->runAction($this->errorAction);
 			if ($result instanceof Response) {