diff --git a/hwloc.spec b/hwloc.spec
index 76cf203..0da1f21 100644
--- a/hwloc.spec
+++ b/hwloc.spec
@@ -1,7 +1,7 @@
 Summary:   Portable Hardware Locality - portable abstraction of hierarchical architectures
 Name:      hwloc
 Version:   1.11.0
-Release:   3%{?dist}
+Release:   4%{?dist}
 License:   BSD
 Group:     Applications/System
 URL:       http://www.open-mpi.org/projects/hwloc/
@@ -44,7 +44,9 @@ about the hardware, bind processes, and much more.
 Summary:   Headers and shared development libraries for hwloc
 Group:     Development/Libraries
 Requires:  %{name}-libs%{?_isa} = %{version}-%{release}
+%ifnarch s390 s390x
 Requires:  libibverbs-devel%{?_isa}
+%endif
 
 %description devel
 Headers and shared object symbolic links for the hwloc.
@@ -142,6 +144,9 @@ make check
 %{_libdir}/hwloc*
 
 %changelog
+* Fri Sep 04 2015 Dan Horák <dan[at]danny.cz> - 1.11.0-4
+- fix devel Requires for s390(x)
+
 * Tue Aug 18 2015 Jirka Hladky <hladky.jiri@gmail.com> - 1.10.0-3
 - Fix for BZ1253977