diff --git a/apps/dav/lib/Connector/Sabre/File.php b/apps/dav/lib/Connector/Sabre/File.php
index f54fbbdd15a..f60b18c4c2a 100644
--- a/apps/dav/lib/Connector/Sabre/File.php
+++ b/apps/dav/lib/Connector/Sabre/File.php
@@ -125,7 +125,7 @@ class File extends Node implements IFile {
 	 * different object on a subsequent GET you are strongly recommended to not
 	 * return an ETag, and just return null.
 	 *
-	 * @param resource $data
+	 * @param resource|string $data
 	 *
 	 * @throws Forbidden
 	 * @throws UnsupportedMediaType