diff --git a/detail/coord.hpp b/detail/coord.hpp
index f3157b37..174cbb0e 100644
--- a/detail/coord.hpp
+++ b/detail/coord.hpp
@@ -126,6 +126,7 @@ namespace util {
 
             typedef T value_type;
             static constexpr size_t dimension = S;
+            static constexpr size_t elements = S;
 
             using coord_data<S,T>::coord_data;
             coord () = default;
diff --git a/region.hpp b/region.hpp
index b6646cf8..9c6d1ec7 100644
--- a/region.hpp
+++ b/region.hpp
@@ -35,7 +35,8 @@ namespace util {
         typedef T size_type;
 
         static constexpr size_t dimension = 2u;
-        typedef T value_type;
+        static constexpr size_t elements = dimension * 2;
+        using value_type = T;
 
         position_type x, y;
         size_type w, h;