diff --git a/Eigen/src/Core/util/Meta.h b/Eigen/src/Core/util/Meta.h
index 11c089020..90eda6e70 100755
--- a/Eigen/src/Core/util/Meta.h
+++ b/Eigen/src/Core/util/Meta.h
@@ -97,6 +97,9 @@ template<> struct is_arithmetic<unsigned int>  { enum { value = true }; };
 template<> struct is_arithmetic<signed long>   { enum { value = true }; };
 template<> struct is_arithmetic<unsigned long> { enum { value = true }; };
 
+#if EIGEN_HAS_CXX11
+using std::is_integral;
+#else
 template<typename T> struct is_integral               { enum { value = false }; };
 template<> struct is_integral<bool>                   { enum { value = true }; };
 template<> struct is_integral<char>                   { enum { value = true }; };
@@ -108,8 +111,8 @@ template<> struct is_integral<signed int>             { enum { value = true }; }
 template<> struct is_integral<unsigned int>           { enum { value = true }; };
 template<> struct is_integral<signed long>            { enum { value = true }; };
 template<> struct is_integral<unsigned long>          { enum { value = true }; };
-template<> struct is_integral<signed long long int>   { enum { value = true }; };
-template<> struct is_integral<unsigned long long int> { enum { value = true }; };
+#endif
+
 
 template <typename T> struct add_const { typedef const T type; };
 template <typename T> struct add_const<T&> { typedef T& type; };