diff --git a/uhd.spec b/uhd.spec
index c8555db..4980589 100644
--- a/uhd.spec
+++ b/uhd.spec
@@ -13,7 +13,7 @@
 Name:           uhd
 URL:            http://code.ettus.com/redmine/ettus/projects/uhd/wiki
 Version:        %{ver_major}.%{ver_minor}.%{ver_patch}
-Release:        3%{?dist}
+Release:        4%{?dist}
 License:        GPLv3+
 BuildRequires:  cmake
 BuildRequires:  boost-devel libusb1-devel python-cheetah
@@ -25,6 +25,10 @@ Requires(pre):  shadow-utils
 Requires:       tkinter
 Group:          Applications/Engineering
 Summary:        Universal Hardware Driver for Ettus Research products
+# Workaround for rhbz#1128127
+%if 0%{?rhel:1}
+ExcludeArch:    ppc64
+%endif
 Source0:        http://github.com/EttusResearch/uhd/archive/release_%{ver_}.tar.gz#/uhd-release_%{ver_}.tar.gz
 Source1:        %{name}-limits.conf
 Source2:        http://files.ettus.com/binaries/uhd_stable/latest_release/uhd-images_%{ver}-release.tar.gz
@@ -167,6 +171,9 @@ getent group usrp >/dev/null || groupadd -r usrp >/dev/null
 %doc %{_docdir}/%{name}/doxygen
 
 %changelog
+* Fri Aug  8 2014 Jaroslav Škarvada <jskarvad@redhat.com> - 3.6.2-4
+- Added workaround for build failure on RHEL-7
+
 * Sun Jun 08 2014 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 3.6.2-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_21_Mass_Rebuild