diff --git a/python-networkx-sphinx.patch b/python-networkx-sphinx.patch
new file mode 100644
index 0000000..137e98e
--- /dev/null
+++ b/python-networkx-sphinx.patch
@@ -0,0 +1,11 @@
+diff -up networkx-networkx-1.11/doc/source/conf.py.sphinx networkx-networkx-1.11/doc/source/conf.py
+--- networkx-networkx-1.11/doc/source/conf.py.sphinx	2016-01-30 10:25:44.000000000 -0700
++++ networkx-networkx-1.11/doc/source/conf.py	2016-12-23 09:54:55.280925006 -0700
+@@ -74,7 +74,6 @@ extensions = [
+     'sphinx.ext.intersphinx',
+     'sphinx.ext.mathjax',
+     'sphinx.ext.napoleon',
+-    'sphinx.ext.pngmath',
+     'sphinx.ext.todo',
+     'sphinx.ext.viewcode',
+     #'sphinxcontrib.bibtex',
diff --git a/python-networkx.spec b/python-networkx.spec
index 713346e..da546f1 100644
--- a/python-networkx.spec
+++ b/python-networkx.spec
@@ -17,6 +17,9 @@ Source0:        https://github.com/networkx/networkx/archive/%{srcname}-%{versio
 Patch0:         %{srcname}-optional-modules.patch
 Patch1:         %{srcname}-nose1.0.patch
 Patch2:         %{srcname}-skip-scipy-0.8-tests.patch
+# Fix sphinx build error
+# https://github.com/networkx/networkx/issues/2340
+Patch3:         python-networkx-sphinx.patch
 BuildArch:      noarch
 
 %description
@@ -200,6 +203,7 @@ Documentation for networkx
 %patch1 -p1
 %patch2 -p1
 %endif
+%patch3 -p1 -b .sphinx
 
 # Fix permissions
 find examples -type f -perm /0111 -exec chmod a-x {} +
@@ -313,6 +317,9 @@ PYTHONPATH=$PWD/site-packages python -c "import networkx; networkx.test()"
 
 
 %changelog
+* Fri Dec 23 2016 Orion Poplawski <orion@cora.nwra.com> - 1.15-5
+- Add patch to fix sphinx build
+
 * Mon Dec 19 2016 Miro Hrončok <mhroncok@redhat.com> - 1.11-5
 - Rebuild for Python 3.6