diff --git a/src/ScaledUploads.php b/src/ScaledUploads.php
index c4db660..9cf4f1e 100644
--- a/src/ScaledUploads.php
+++ b/src/ScaledUploads.php
@@ -55,7 +55,7 @@ public function onAfterLoadIntoFile($file)
         }
 
         // get parent folder path
-        $folder = rtrim($file->Parent()->getFilename(), '/');
+        $folder = rtrim(strval($file->Parent()->getFilename()), '/');
 
         $custom_folders = $this->config()->get('custom_folders');