diff --git a/storage/filesystem.go b/storage/filesystem.go
index ce9f00b..0d9f09d 100644
--- a/storage/filesystem.go
+++ b/storage/filesystem.go
@@ -582,9 +582,7 @@ func (b *filesystemBackend) QueryCalendarObjects(ctx context.Context, query *cal
 		return result, err
 	}
 
-	return result, nil
-	// TODO implement:
-	//return caldav.Filter(query, result)
+	return caldav.Filter(query, result)
 }
 
 func (b *filesystemBackend) PutCalendarObject(ctx context.Context, objPath string, calendar *ical.Calendar, opts *caldav.PutCalendarObjectOptions) (loc string, err error) {