diff --git a/libcxx/include/__memory/allocator.h b/libcxx/include/__memory/allocator.h
--- a/libcxx/include/__memory/allocator.h
+++ b/libcxx/include/__memory/allocator.h
@@ -81,6 +81,7 @@
 class _LIBCPP_TEMPLATE_VIS allocator
     : private __non_trivial_if<!is_void<_Tp>::value, allocator<_Tp> >
 {
+    static_assert(!is_const<_Tp>::value, "std::allocator does not support const types");
     static_assert(!is_volatile<_Tp>::value, "std::allocator does not support volatile types");
 public:
     typedef size_t      size_type;