diff --git a/spack.changes b/spack.changes
index 1da5731..3a333be 100644
--- a/spack.changes
+++ b/spack.changes
@@ -4,6 +4,8 @@ Mon Jun 26 12:26:10 UTC 2023 - Egbert Eich <eich@suse.com>
 - Add hwloc-devel and sqlite3 to the packages that trigger a
   `spack external find`.
 - Change /usr/bin to %{_bindir}.
+- Make sure, libhwloc and hwloc are installed together when
+  spack is installed.
 
 -------------------------------------------------------------------
 Thu Jun  1 11:32:36 UTC 2023 - Egbert Eich <eich@suse.com>
diff --git a/spack.spec b/spack.spec
index 59580ac..aff1771 100644
--- a/spack.spec
+++ b/spack.spec
@@ -94,6 +94,8 @@ Requires:       tar
 Requires:       unzip
 Requires:       xz
 Recommends:     %spack_trigger_recommended_packages %spack_trigger_recommended_compilers
+Requires:       (hwloc if hwloc-devel)
+Requires:       (hwloc-devel if hwloc)
 %else
 BuildRequires:  git
 BuildRequires:  makeinfo