diff --git a/libs/timezone/timezone_tests/conversion_tests.cpp b/libs/timezone/timezone_tests/conversion_tests.cpp
index 9969f53db1..xxxxxxxxxx 100644
--- a/libs/timezone/timezone_tests/conversion_tests.cpp
+++ b/libs/timezone/timezone_tests/conversion_tests.cpp
@@ -1,4 +1,5 @@
 #include <gtest/gtest.h>
+#include <iomanip>

 #include "timezone/serdes.hpp"