Index: stdtypes.rst
===================================================================
--- stdtypes.rst	(revision 87413)
+++ stdtypes.rst	(working copy)
@@ -2665,6 +2665,10 @@
       A tuple of integers the length of :attr:`ndim` giving the size in bytes to
       access each element for each dimension of the array.
 
+   .. attribute:: readonly
+
+      An indicator of whether the memory is read only.
+
    .. memoryview.suboffsets isn't documented because it only seems useful for C