diff --git a/forms/UploadField.php b/forms/UploadField.php
index d5c81e0a4..cae89b779 100644
--- a/forms/UploadField.php
+++ b/forms/UploadField.php
@@ -1235,6 +1235,7 @@ class UploadField extends FileField {
 		// Format response with json
 		$response = new SS_HTTPResponse(Convert::raw2json(array($return)));
 		$response->addHeader('Content-Type', 'text/plain');
+		if (!empty($return['error'])) $response->setStatusCode(403);
 		return $response;
 	}