diff --git a/ocaml-postgresql.spec b/ocaml-postgresql.spec
index b3e82c5..2eb5be9 100644
--- a/ocaml-postgresql.spec
+++ b/ocaml-postgresql.spec
@@ -11,6 +11,7 @@ License:        LGPLv2+ with exceptions
 URL:            http://www.ocaml.info/home/ocaml_sources.html#postgresql-ocaml
 Source0:        http://hg.ocaml.info/release/postgresql-ocaml/archive/release-%{version}.tar.bz2
 BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
+ExcludeArch:    sparc64 s390 s390x
 
 BuildRequires:  ocaml >= 3.10.0
 BuildRequires:  ocaml-findlib-devel
@@ -91,6 +92,10 @@ 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)
+
 * Tue Mar 10 2009 Richard W.M. Jones <rjones@redhat.com> - 1.10.3-1
 - New upstream version 1.10.3.
 - Fix URL.