diff --git a/crypto/chacha_private.h b/crypto/chacha_private.h
index d016773a10..a2ec144549 100644
--- a/crypto/chacha_private.h
+++ b/crypto/chacha_private.h
@@ -1,9 +1,8 @@
 /****************************************************************************
  * crypto/chacha_private.h
  *
- * $OpenBSD: chacha_private.h,v 1.4 2020/07/22 13:54:30 tobhe Exp $
+ * SPDX-License-Identifier: NuttX-PublicDomain
  *
- * chacha-merged.c version 20080118
  * D. J. Bernstein
  * Public domain.
  ****************************************************************************/