diff --git a/base/include/hidl/HidlSupport.h b/base/include/hidl/HidlSupport.h
index 93a6251..4c133c1 100644
--- a/base/include/hidl/HidlSupport.h
+++ b/base/include/hidl/HidlSupport.h
@@ -326,6 +326,8 @@
 
 template<typename T>
 struct hidl_vec {
+    using value_type = T;
+
     hidl_vec() {
         static_assert(hidl_vec<T>::kOffsetOfBuffer == 0, "wrong offset");
 
@@ -793,7 +795,7 @@
 // An array of T's. Assumes that T::operator=(const T &) is defined.
 template<typename T, size_t SIZE1>
 struct hidl_array<T, SIZE1> {
-
+    using value_type = T;
     using std_array_type = typename details::std_array<T, SIZE1>::type;
 
     hidl_array() = default;