diff --git a/Eigen/Core b/Eigen/Core
index fd6edc018..2ab44fb3c 100644
--- a/Eigen/Core
+++ b/Eigen/Core
@@ -80,6 +80,10 @@
 // for min/max:
 #include <algorithm>
 
+#if EIGEN_HAS_CXX11
+#include <array>
+#endif
+
 // for std::is_nothrow_move_assignable
 #ifdef EIGEN_INCLUDE_TYPE_TRAITS
 #include <type_traits>
diff --git a/Eigen/src/Core/util/Meta.h b/Eigen/src/Core/util/Meta.h
index 33dc0034c..748f24b1e 100755
--- a/Eigen/src/Core/util/Meta.h
+++ b/Eigen/src/Core/util/Meta.h
@@ -360,13 +360,6 @@ template<typename T, int N> struct array_size<T (&)[N]> {
 };
 
 #if EIGEN_HAS_CXX11
-}}
-namespace std {
-  template<class T, std::size_t N> struct array;
-}
-namespace Eigen {
-namespace internal {
-
 template<typename T, std::size_t N> struct array_size<const std::array<T,N> > {
   enum { value = N };
 };