diff --git a/src/include/ndpi_private.h b/src/include/ndpi_private.h
index 76aee10b08d..cfec9b71357 100644
--- a/src/include/ndpi_private.h
+++ b/src/include/ndpi_private.h
@@ -1,3 +1,25 @@
+/*
+ *
+ * Copyright (C) 2011-24 - ntop.org
+ *
+ * This file is part of nDPI, an open source deep packet inspection
+ * library based on the OpenDPI and PACE technology by ipoque GmbH
+ *
+ * nDPI is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * nDPI is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with nDPI.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
 #ifndef __NDPI_PRIVATE_H__
 #define __NDPI_PRIVATE_H__