diff --git a/0866-Pull-isnan-into-std-namespace-include-cmath-not-math.patch b/0866-Pull-isnan-into-std-namespace-include-cmath-not-math.patch
new file mode 100644
index 0000000..6c10c52
--- /dev/null
+++ b/0866-Pull-isnan-into-std-namespace-include-cmath-not-math.patch
@@ -0,0 +1,26 @@
+From 034ff1bfd7c97acd793132c8a50c099af656fb15 Mon Sep 17 00:00:00 2001
+From: Matthias Andree <matthias.andree@gmx.de>
+Date: Sat, 29 Oct 2016 13:38:27 +0200
+Subject: [PATCH 0866/1096] Pull isnan() into std:: namespace, #include
+ <cmath>, not <math.h>.
+
+---
+ tests/test_modifier.cpp | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/tests/test_modifier.cpp b/tests/test_modifier.cpp
+index 9c6def6..f087917 100644
+--- a/tests/test_modifier.cpp
++++ b/tests/test_modifier.cpp
+@@ -3,7 +3,7 @@
+ #ifdef _MSC_VER
+ #define _USE_MATH_DEFINES
+ #endif
+-#include <math.h>
++#include <cmath>
+ #include "lensfun.h"
+ 
+ typedef struct {
+-- 
+1.8.3.1
+
diff --git a/lensfun.spec b/lensfun.spec
index e6adfd8..78db9c9 100644
--- a/lensfun.spec
+++ b/lensfun.spec
@@ -1,12 +1,15 @@
-%if !0%{?bootstrap} && (0%{?fedora} > 23 || 0%{?rhel} > 7)
+%if !0%{?bootstrap} && (0%{?fedora} || 0%{?rhel} > 6)
 %global tests 1
-%global python3 1
+%global python3 python3 
+%if 0%{?rhel} == 7
+%global python3 python34
+%endif
 %endif
 
 Name:    lensfun
 Version: 0.3.2
 Summary: Library to rectify defects introduced by photographic lenses
-Release: 12%{?dist}
+Release: 13%{?dist}
 
 License: LGPLv3 and CC-BY-SA
 URL: http://lensfun.sourceforge.net/
@@ -20,6 +23,9 @@ Patch59: 0059-Patch-47-respect-DESTDIR-when-installing-python-stuf.patch
 Patch60: 0060-Various-CMake-patches-from-the-mailing-list.patch
 Patch113: 0113-Added-std-namespace-to-isnan.patch
 
+## upstream patches (master branch)
+Patch866: 0866-Pull-isnan-into-std-namespace-include-cmath-not-math.patch
+
 ## upstreamable patches
 # install manpages only when INSTALL_HELPER_SCRIPTS=ON
 Patch200: lensfun-0.3.2-INSTALL_HELPER_SCRIPTS.patch
@@ -29,13 +35,19 @@ BuildRequires: doxygen
 BuildRequires: pkgconfig(glib-2.0) 
 BuildRequires: pkgconfig(libpng) 
 BuildRequires: pkgconfig(zlib)
-%if 0%{?python3}
-BuildRequires: python3 python3-devel
+%if 0%{?python3:1}
+BuildRequires: %{python3} %{python3}-devel
 %else
+Obsoletes: lensfun-python3 < %{version}-%{release}
+#Obsoletes: lensfun-python34 < %{version}-%{release}
 Obsoletes: lensfun-tools < %{version}-%{release}
 %endif
 # for rst2man, if INSTALL_HELPER_SCRIPTS != OFF
+%if 0%{?fedora} || 0%{?rhel} > 7
 BuildRequires: python2-docutils
+%else
+BuildRequires: python-docutils
+%endif
 
 %description
 The lensfun library provides an open source database of photographic lenses and
@@ -56,15 +68,15 @@ using lensfun.
 %package tools
 Summary: Tools for managing %{name} data
 License: LGPLv3
-Requires: python3-lensfun = %{version}-%{release}
+Requires: %{python3}-lensfun = %{version}-%{release}
 %description tools
 This package contains tools to fetch lens database updates and manage lens
 adapters in lensfun.
 
-%package -n python3-lensfun
+%package -n %{python3}-lensfun
 Summary:  Python3 lensfun bindings
 Requires: %{name}%{?_isa} = %{version}-%{release}
-%description -n python3-lensfun
+%description -n %{python3}-lensfun
 %{summary}.
 
 
@@ -78,9 +90,11 @@ Requires: %{name}%{?_isa} = %{version}-%{release}
 %patch60 -p1 -b .0060
 %patch113 -p1 -b .0113
 
+%patch866 -p1 -b .0866
+
 %patch200 -p1 -b .INSTALL_HELPER_SCRIPTS
 
-%if 0%{?python3}
+%if 0%{?python3:1}
 sed -i.shbang \
   -e "s|^#!/usr/bin/env python3$|#!%{__python3}|g" \
   apps/lensfun-add-adapter \
@@ -144,7 +158,7 @@ popd
 %{_libdir}/liblensfun.so
 %{_libdir}/pkgconfig/lensfun.pc
 
-%if 0%{?python3}
+%if 0%{?python3:1}
 %files tools
 %{_bindir}/lensfun-add-adapter
 %{_bindir}/lensfun-update-data
@@ -158,6 +172,9 @@ popd
 
 
 %changelog
+* Mon Feb 12 2018 Rex Dieter <rdieter@fedoraproject.org> 0.3.2-13
+- -tools: make buildable on epel7/python34
+
 * Wed Feb 07 2018 Iryna Shcherbina <ishcherb@redhat.com> - 0.3.2-12
 - Update Python 2 dependency declarations to new packaging standards
   (See https://fedoraproject.org/wiki/FinalizingFedoraSwitchtoPython3)