diff --git a/hwloc.spec b/hwloc.spec
index 25d73f3..4b8a3ed 100644
--- a/hwloc.spec
+++ b/hwloc.spec
@@ -1,7 +1,7 @@
 Summary:   Portable Hardware Locality - portable abstraction of hierarchical architectures
 Name:      hwloc
 Version:   1.1
-Release:   0%{?dist}
+Release:   0.1%{?dist}
 License:   BSD
 Group:     Applications/System
 URL:       http://www.open-mpi.org/projects/hwloc/
@@ -15,7 +15,10 @@ Patch0:    2967_lstopo.patch
 #
 # Rename hwloc-gather-topology.sh to hwloc-gather-topology to be consistent with the upcoming version 1.2
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
-BuildRequires: libX11-devel,libxml2-devel,cairo-devel,numactl-devel
+BuildRequires: libX11-devel libxml2-devel cairo-devel
+%ifnarch s390 s390x
+BuildRequires: numactl-devel
+%endif
 
 %description
 The Portable Hardware Locality (hwloc) software package provides 
@@ -35,7 +38,6 @@ about the hardware, bind processes, and much more.
 Summary:   Headers and shared development libraries for hwloc
 Group:     Development/Libraries
 Requires:  %{name} = %{version}-%{release}
-BuildRequires: libX11-devel,libxml2-devel,cairo-devel, numactl-devel
 
 %description devel
 Headers and shared object symbolic links for the hwloc.
@@ -119,6 +121,9 @@ Headers and shared object symbolic links for the hwloc.
 
 
 %changelog
+* Mon Jan  3 2011 Dan Horák <dan[at]danny.cz> - 1.1-0.1
+- fix build on s390(x) where numactl is missing
+
 * Sat Jan  1 2011 Jirka Hladky <hladky.jiri@gmail.com> - 1.1-0
 - 1.1 rel# Patch to the 1.1 fix 2967 http://www.open-mpi.org/software/hwloc/nightly/v1.1/hwloc-1.1rc6r2967.tar.bz2
 - Fix hwloc_bitmap_to_ulong right after allocating the bitmap.