diff --git a/ocaml-calendar.spec b/ocaml-calendar.spec
index 48ef4e3..17c8751 100644
--- a/ocaml-calendar.spec
+++ b/ocaml-calendar.spec
@@ -11,6 +11,7 @@ License:        LGPLv2
 URL:            http://www.lri.fr/~signoles/prog.en.html#calendar
 Source0:        http://www.lri.fr/~signoles/prog/calendar/calendar-%{version}.tar.gz
 BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
+ExcludeArch:    sparc64 s390 s390x
 
 BuildRequires:  ocaml >= 3.10.1
 BuildRequires:  ocaml-findlib-devel, ocaml-ocamldoc
@@ -82,6 +83,10 @@ 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> - 2.0.4-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_11_Mass_Rebuild