diff --git a/tf_fuzz/tfz-cpp/utility/gibberish.cpp b/tf_fuzz/tfz-cpp/utility/gibberish.cpp
index 6de56f0..436ace4 100644
--- a/tf_fuzz/tfz-cpp/utility/gibberish.cpp
+++ b/tf_fuzz/tfz-cpp/utility/gibberish.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019-2022, Arm Limited. All rights reserved.
+ * Copyright (c) 2019-2024, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  *
@@ -14,6 +14,7 @@
  */
 
 #include <string>
+#include <cstdlib>
 
 #include "gibberish.hpp"  // shouldn't need any other project headers