diff --git a/libs/libc/stdlib/lib_bsearch.c b/libs/libc/stdlib/lib_bsearch.c
index 17e43774be..18ca964846 100644
--- a/libs/libc/stdlib/lib_bsearch.c
+++ b/libs/libc/stdlib/lib_bsearch.c
@@ -1,8 +1,10 @@
 /****************************************************************************
  * libs/libc/stdlib/lib_bsearch.c
  *
- *   Copyright (c) 1990, 1993
- *   The Regents of the University of California.  All rights reserved.
+ * SPDX-License-Identifier: BSD-3-Clause
+ * SPDX-FileCopyrightText: 1990 The Regents of the University of California.
+ * SPDX-FileCopyrightText: 1993 The Regents of the University of California.
+ * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
diff --git a/libs/libc/stdlib/lib_qsort.c b/libs/libc/stdlib/lib_qsort.c
index 24b82c957b..5646452388 100644
--- a/libs/libc/stdlib/lib_qsort.c
+++ b/libs/libc/stdlib/lib_qsort.c
@@ -1,13 +1,12 @@
 /****************************************************************************
  * libs/libc/stdlib/lib_qsort.c
  *
- *   Copyright (C) 2007, 2009, 2011 Gregory Nutt. All rights reserved.
- *   Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * Leveraged from:
- *
- *  Copyright (c) 1992, 1993
- *  The Regents of the University of California.  All rights reserved.
+ * SPDX-License-Identifier: BSD-3-Clause
+ * SPDX-FileCopyrightText: 2007, 2009, 2011 Gregory Nutt.
+ * SPDX-FileCopyrightText: 1993 The Regents of the University of California.
+ * SPDX-FileCopyrightText: 1990 The Regents of the University of California.
+ * SPDX-FileContributor: Gregory Nutt <gnutt@nuttx.org>
+ * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions