diff --git a/mono.spec b/mono.spec
index a75b860..ab57f15 100644
--- a/mono.spec
+++ b/mono.spec
@@ -11,6 +11,8 @@ 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 s390x armv4l sparc
 # Buildroots are hosed atm
 ExcludeArch: s390 s390x