diff --git a/lib/arm_profiler/include/arm_profiler.hpp b/lib/arm_profiler/include/arm_profiler.hpp
index 9c7b5f3..9d9f543 100644
--- a/lib/arm_profiler/include/arm_profiler.hpp
+++ b/lib/arm_profiler/include/arm_profiler.hpp
@@ -1,6 +1,5 @@
 /*
- * SPDX-FileCopyrightText: Copyright 2021-2022 Arm Limited and/or its affiliates <open-source-office@arm.com>
- *
+ * SPDX-FileCopyrightText: Copyright 2021-2022, 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
@@ -36,8 +35,8 @@
 private:
     size_t max_events_;
     std::unique_ptr<const char *[]> tags_;
-    std::unique_ptr<int32_t[]> start_ticks_;
-    std::unique_ptr<int32_t[]> end_ticks_;
+    std::unique_ptr<uint32_t[]> start_ticks_;
+    std::unique_ptr<uint32_t[]> end_ticks_;
 
     size_t num_events_;
 
diff --git a/lib/arm_profiler/src/arm_profiler.cpp b/lib/arm_profiler/src/arm_profiler.cpp
index 2977474..d09cdf0 100644
--- a/lib/arm_profiler/src/arm_profiler.cpp
+++ b/lib/arm_profiler/src/arm_profiler.cpp
@@ -1,6 +1,5 @@
 /*
- * Copyright (c) 2021-2022 Arm Limited. All rights reserved.
- *
+ * SPDX-FileCopyrightText: Copyright 2021-2022, 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
@@ -30,8 +29,8 @@
 
 ArmProfiler::ArmProfiler(size_t max_events) : max_events_(max_events), num_events_(0) {
     tags_        = std::make_unique<const char *[]>(max_events_);
-    start_ticks_ = std::make_unique<int32_t[]>(max_events_);
-    end_ticks_   = std::make_unique<int32_t[]>(max_events_);
+    start_ticks_ = std::make_unique<uint32_t[]>(max_events_);
+    end_ticks_   = std::make_unique<uint32_t[]>(max_events_);
 }
 
 uint32_t ArmProfiler::BeginEvent(const char *tag) {