diff --git a/apps/dav/lib/CalDAV/CalDavBackend.php b/apps/dav/lib/CalDAV/CalDavBackend.php
index 2daecc72496..e3b90a00695 100644
--- a/apps/dav/lib/CalDAV/CalDavBackend.php
+++ b/apps/dav/lib/CalDAV/CalDavBackend.php
@@ -415,7 +415,7 @@ class CalDavBackend extends AbstractBackend implements SyncSupport, Subscription
 			$calendar[$xmlName] = $row[$dbName];
 		}
 
-		return array_values($calendar);
+		return $calendar;
 
 	}