#5642: clarify map() compatibility to the builtin.
diff --git a/Doc/library/multiprocessing.rst b/Doc/library/multiprocessing.rst
index 8abf146..8a99523 100644
--- a/Doc/library/multiprocessing.rst
+++ b/Doc/library/multiprocessing.rst
@@ -1549,8 +1549,8 @@
.. method:: map(func, iterable[, chunksize])
- A parallel equivalent of the :func:`map` builtin function. It blocks till
- the result is ready.
+ A parallel equivalent of the :func:`map` builtin function (it supports only
+ one *iterable* argument though). It blocks till the result is ready.
This method chops the iterable into a number of chunks which it submits to
the process pool as separate tasks. The (approximate) size of these