diff --git a/Error/ErrorHandler.php b/Error/ErrorHandler.php
index b145ea973..a5d504237 100644
--- a/Error/ErrorHandler.php
+++ b/Error/ErrorHandler.php
@@ -164,9 +164,9 @@ public function handleErrors(ExecutionResult $executionResult, $throwRawExceptio
      *
      * @param \Exception $rawException
      *
-     * @return \Exception
+     * @return \Exception|\Error
      */
-    protected function convertException(\Exception $rawException = null)
+    protected function convertException($rawException = null)
     {
         if (null === $rawException) {
             return;