diff --git a/typo3/sysext/core/Classes/Resource/ResourceStorage.php b/typo3/sysext/core/Classes/Resource/ResourceStorage.php
index 7f33867c4febafc3cc98b8d416f4bab636962e81..f9a82026519469b53a925e8c2f56778e3b9152ea 100644
--- a/typo3/sysext/core/Classes/Resource/ResourceStorage.php
+++ b/typo3/sysext/core/Classes/Resource/ResourceStorage.php
@@ -977,7 +977,7 @@ class ResourceStorage implements ResourceStorageInterface
     {
         // Check if targetFolder is within this storage
         if ($this->getUid() !== $targetFolder->getStorage()->getUid()) {
-            throw new \RuntimeException('The target folder is not in the same storage. Target folder given: "' . $targetFolder . '"', 1422553107);
+            throw new \RuntimeException('The target folder is not in the same storage. Target folder given: "' . $targetFolder->getIdentifier() . '"', 1422553107);
         }
         // Check for a valid file extension
         if (!$this->checkFileExtensionPermission($targetFileName)) {