diff --git a/mono.spec b/mono.spec
index 0acf46f..354d242 100644
--- a/mono.spec
+++ b/mono.spec
@@ -12,9 +12,7 @@ BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 BuildRequires:  bison, glib2-devel, pkgconfig, libicu-devel libgdiplus
 
 # JIT only availible on these:
-ExclusiveArch: %ix86 x86_64 ppc ia64 s390 armv4l sparc
-# Some build failure on s390
-ExcludeArch: s390
+ExclusiveArch: %ix86 x86_64 ppc ia64 s390 s390x armv4l sparc
 
 %description
 The Mono runtime implements a JIT engine for the ECMA CLI