diff --git a/lib/private/files/objectstore/objectstorestorage.php b/lib/private/files/objectstore/objectstorestorage.php
index 16b28a61ece7dd0d73833dcfc6705c888ee710c5..4bc258a5807f37c2348276fcb3e42d46527eedee 100644
--- a/lib/private/files/objectstore/objectstorestorage.php
+++ b/lib/private/files/objectstore/objectstorestorage.php
@@ -406,4 +406,14 @@ class ObjectStoreStorage extends \OC\Files\Storage\Common {
 		return true;
 	}
 
-}
\ No newline at end of file
+	/**
+	 * external changes are not supported
+	 *
+	 * @param string $path
+	 * @param int $time
+	 * @return bool
+	 */
+	public function hasUpdated($path, $time) {
+		return false;
+	}
+}