Dynamic memory allocation with aligned storage

I'm a bit confused about the alignement requirements when std::aligned_storage is used and dynamic allocation is needed. Example:

  using storage = typename std::aligned_storage<sizeof(T), std::alignment_of<T>::value>::type;
  storage* pool;
  pool = ::new storage[num_obj];

Is it legal? The new operator doesn't return alignment memory, so is the result correct?