diff --git a/opm/simulators/utils/DamarisVar.cpp b/opm/simulators/utils/DamarisVar.cpp
index 22e506ebf..8ee4478a2 100644
--- a/opm/simulators/utils/DamarisVar.cpp
+++ b/opm/simulators/utils/DamarisVar.cpp
@@ -25,6 +25,7 @@
 #include <fmt/format.h>
 
 #include <algorithm>
+#include <array>
 #include <cassert>
 #include <string_view>
 #include <typeinfo>