diff --git a/nifty_gridder.cc b/nifty_gridder.cc
index 229cc3085694606aa6583b4f1ab016bc7440ffe0..488edefbb6b35e163dba887fc49fda72b228753e 100644
--- a/nifty_gridder.cc
+++ b/nifty_gridder.cc
@@ -16,6 +16,9 @@
  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
+/* Copyright (C) 2019 Max-Planck-Society
+   Author: Martin Reinecke */
+
 #include <pybind11/pybind11.h>
 #include <pybind11/numpy.h>
 #include <iostream>