--- /dev/null
+//-----------------------------------------------------------------------------
+// Copyright (C) 2018 Merlok
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// CA PEM certificates
+//-----------------------------------------------------------------------------
+//
+
+#ifndef __ADDITIONAL_CA_H__
+#define __ADDITIONAL_CA_H__
+
+#include <stddef.h>
+
+// Concatenation of all CA certificates in PEM format if available
+extern const char additional_ca_pem[];
+extern const size_t additional_ca_pem_len;
+
+#endif /* __ADDITIONAL_CA_H__ */