diff --git a/array/parray.hpp b/array/parray.hpp
index 6f99c167..767eab27 100644
--- a/array/parray.hpp
+++ b/array/parray.hpp
@@ -23,6 +23,14 @@ namespace cruft {
     >
     class parray {
     public:
+        using value_type = DataT;
+        using size_type = SizeT;
+        using reference = DataT&;
+        using const_reference = DataT const&;
+        using iterator = DataT*;
+        using const_iterator = DataT const*;
+        using difference_type = std::ptrdiff_t;
+
         parray (DataT *data, SizeT size);
 
         template <SizeT SizeV>