diff --git a/ocaml-gsl.spec b/ocaml-gsl.spec
index 543396a..d96d143 100644
--- a/ocaml-gsl.spec
+++ b/ocaml-gsl.spec
@@ -11,6 +11,7 @@ License:        GPLv2
 URL:            http://oandrieu.nerim.net/ocaml/gsl/
 Source0:        http://oandrieu.nerim.net/ocaml/gsl/ocamlgsl-%{version}.tar.gz
 BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
+ExcludeArch:    sparc64 s390 s390x
 
 BuildRequires:  ocaml >= 3.07
 BuildRequires:  ocaml-findlib-devel
@@ -102,6 +103,10 @@ rm -rf $RPM_BUILD_ROOT
 
 
 %changelog
+* Thu Apr 16 2009 S390x secondary arch maintainer <fedora-s390x@lists.fedoraproject.org>
+- ExcludeArch sparc64, s390, s390x as we don't have OCaml on those archs
+  (added sparc64 per request from the sparc maintainer)
+
 * Wed Feb 25 2009 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 0.6.0-7
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_11_Mass_Rebuild