diff --git a/lib/Mount/GroupFolderStorage.php b/lib/Mount/GroupFolderStorage.php
index de264cad9..cd00c272d 100644
--- a/lib/Mount/GroupFolderStorage.php
+++ b/lib/Mount/GroupFolderStorage.php
@@ -91,4 +91,8 @@ public function getScanner($path = '', $storage = null) {
 		}
 		return $storage->scanner;
 	}
+
+	public function hasUpdated($path, $time) {
+		return false;
+	}
 }