diff --git a/doxygen/input/doc_x509.h b/doxygen/input/doc_x509.h
index 315f0e3..9b52569 100644
--- a/doxygen/input/doc_x509.h
+++ b/doxygen/input/doc_x509.h
@@ -1,6 +1,9 @@
 /**
- * @file
- * X.509 module documentation file.
+ * \file doc_x509.h
+ *
+ * \brief X.509 module documentation file.
+ */
+/*
  *
  *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
  *  SPDX-License-Identifier: Apache-2.0