diff --git a/unsupported/test/cxx11_meta.cpp b/unsupported/test/cxx11_meta.cpp
index 4f45e1dd3..f9179bbe6 100644
--- a/unsupported/test/cxx11_meta.cpp
+++ b/unsupported/test/cxx11_meta.cpp
@@ -9,6 +9,7 @@
 
 #include "main.h"
 
+#include <array>
 #include <Eigen/CXX11/Core>
 
 using Eigen::internal::is_same;