From fc73f195a520bf39772d86fd8d6260f40c5842fc Mon Sep 17 00:00:00 2001
From: Paul Romano <paul.k.romano@gmail.com>
Date: Fri, 23 Feb 2018 11:54:16 -0600
Subject: [PATCH] Mention mpi4py as optional dependency in docs

---
 docs/source/usersguide/install.rst | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/docs/source/usersguide/install.rst b/docs/source/usersguide/install.rst
index 9b11d1dce..24bcc7164 100644
--- a/docs/source/usersguide/install.rst
+++ b/docs/source/usersguide/install.rst
@@ -452,6 +452,11 @@ distributions.
 .. admonition:: Optional
    :class: note
 
+   `mpi4py <http://mpi4py.scipy.org/>`_
+      mpi4py provides Python bindings to MPI for running distributed-memory
+      parallel runs. This package is needed if you plan on running depletion
+      simulations in parallel using MPI.
+
    `Cython <http://cython.org/>`_
       Cython is used for resonance reconstruction for ENDF data converted to
       :class:`openmc.data.IncidentNeutron`.