1diff --git a/src/UnitTest/test_local_cache.cpp b/src/UnitTest/test_local_cache.cpp
2index 5fbc31b..6b8d52e 100644
3--- a/src/UnitTest/test_local_cache.cpp
4+++ b/src/UnitTest/test_local_cache.cpp
5@@ -5,6 +5,7 @@
6 #include <gtest/gtest.h>
7
8 #undef NDEBUG // ensure that asserts are never compiled out
9+#include <array>
10 #include <cassert>
11 #include <cstdio>
12 #include <cstring>