diff --git a/olp-cpp-sdk-authentication/tests/CryptoTest.cpp b/olp-cpp-sdk-authentication/tests/CryptoTest.cpp
index 3420ba130..7d943652f 100644
--- a/olp-cpp-sdk-authentication/tests/CryptoTest.cpp
+++ b/olp-cpp-sdk-authentication/tests/CryptoTest.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2020 HERE Europe B.V.
+ * Copyright (C) 2020-2025 HERE Europe B.V.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -19,6 +19,7 @@
 
 #include <gtest/gtest.h>
 
+#include <iomanip>
 #include <sstream>
 
 #include <olp/authentication/Crypto.h>