diff --git a/lib/Exceptions/ValidationException.php b/lib/Exceptions/ValidationException.php
index 93d6b5ca..deeadcc8 100644
--- a/lib/Exceptions/ValidationException.php
+++ b/lib/Exceptions/ValidationException.php
@@ -19,7 +19,7 @@ class ValidationException extends AppException{
 
 	public function Add(\Exception $exception, bool $isFatal = false): void{
 		/** @var ValidationException $exception */
-		if($exception instanceof static){
+		if(is_a($exception, ValidationException::class)){
 			foreach($exception->Exceptions as $childException){
 				$this->Add($childException);
 			}