diff --git a/Classes/Controller/AbstractApiController.php b/Classes/Controller/AbstractApiController.php
index 97fe5217..07407c11 100644
--- a/Classes/Controller/AbstractApiController.php
+++ b/Classes/Controller/AbstractApiController.php
@@ -83,7 +83,7 @@ protected function errorAction()
     {
         $error = $this->findFirstError($this->arguments->getValidationResults());
 
-        if ($error instanceof Error) {
+        if (!($error instanceof Error)) {
             $error = new Error('Unknown Error while dispatching the controller action.', 1400683671);
         }
 
@@ -115,4 +115,4 @@ protected function findFirstError(\TYPO3\CMS\Extbase\Error\Result $validationRes
 
         return null;
     }
-}
\ No newline at end of file
+}