diff --git a/pacemaker.spec b/pacemaker.spec
index 4ba10a9..9e595d5 100644
--- a/pacemaker.spec
+++ b/pacemaker.spec
@@ -3,7 +3,9 @@
 %global pcmk_docdir %{_docdir}/%{name}
 
 # Supported cluster stacks, must support at least one
+%ifnarch s390 s390x
 %bcond_without ais
+%endif
 %bcond_without heartbeat
 
 # ESMTP is not available in RHEL, only in EPEL. Allow people to build
@@ -16,7 +18,7 @@
 # We generate some docs using Publican, but its not available everywhere
 %bcond_without publican
 
-%global specversion 3
+%global specversion 4
 %global upstream_version Pacemaker-1.1.2
 %global upstream_prefix Pacemaker-1-1-
 
@@ -305,6 +307,9 @@ rm -rf %{buildroot}
 %doc AUTHORS
 
 %changelog
+* Fri Jul  9 2010 Dan Horák <dan[at]danny.cz> - 1.1.2-4
+- AIS cluster not available on s390(x)
+
 * Mon Jun 21 2010 Andrew Beekhof <andrew@beekhof.net> - 1.1.2-3
 - publican is only available as a dependancy on i386/x86_64 machines