diff --git a/lib/libc/strlen.c b/lib/libc/strlen.c
index e4b79d9..cc1d1df 100644
--- a/lib/libc/strlen.c
+++ b/lib/libc/strlen.c
@@ -1,10 +1,10 @@
 /*
- * Copyright (c) 2018, Arm Limited and Contributors. All rights reserved.
+ * Copyright (c) 2018-2025, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#include <string.h>
+#include <string_private.h>
 
 size_t strlen(const char *s)
 {