diff --git a/src/testbench/base/mcmtest.cc b/src/testbench/base/mcmtest.cc
index cc2314f..f7f7bb7 100644
--- a/src/testbench/base/mcmtest.cc
+++ b/src/testbench/base/mcmtest.cc
@@ -9,6 +9,7 @@
 #include "mcmtest.h"
 #include "testing.h"
 #include <random>
+#include <array>
 #include <type_traits>