diff --git a/cmake/toolchain/armclang.cmake b/cmake/toolchain/armclang.cmake
index 61a8e59..74ff007 100644
--- a/cmake/toolchain/armclang.cmake
+++ b/cmake/toolchain/armclang.cmake
@@ -1,6 +1,5 @@
 #
-# Copyright (c) 2020-2022 Arm Limited. All rights reserved.
-#
+# SPDX-FileCopyrightText: Copyright 2020-2022, 2024 Arm Limited and/or its affiliates <open-source-office@arm.com>
 # SPDX-License-Identifier: Apache-2.0
 #
 # Licensed under the Apache License, Version 2.0 (the License); you may
@@ -65,7 +64,7 @@
     --lto
     --info common,debug,sizes,totals,veneers,unused
     --symbols
-    --diag_suppress=L6439W)
+    --diag_suppress=L6439W,L6314W)
 
 # Compilation warnings
 add_compile_options(