Index: include/llvm/ADT/ArrayRef.h
===================================================================
--- include/llvm/ADT/ArrayRef.h
+++ include/llvm/ADT/ArrayRef.h
@@ -45,6 +45,7 @@
     using const_iterator = const T *;
     using size_type = size_t;
     using reverse_iterator = std::reverse_iterator<iterator>;
+    using value_type = typename std::remove_cv<T>::type;
 
   private:
     /// The start of the array, in an external buffer.
Index: unittests/ADT/ArrayRefTest.cpp
===================================================================
--- unittests/ADT/ArrayRefTest.cpp
+++ unittests/ADT/ArrayRefTest.cpp
@@ -52,6 +52,14 @@
     "Assigning from an initializer list");
 #endif
 
+// Check Typedefs.
+static_assert(
+    std::is_same<ArrayRef<int>::value_type, int>::value,
+    "erroneous value_type");
+static_assert(
+    std::is_same<ArrayRef<const int>::value_type, int>::value,
+    "erroneous value_type");
+
 namespace {
 
 TEST(ArrayRefTest, AllocatorCopy) {