diff --git a/emacs.spec b/emacs.spec
index 4c2eacb..0e53aae 100644
--- a/emacs.spec
+++ b/emacs.spec
@@ -1,4 +1,6 @@
 # This file is encoded in UTF-8.  -*- coding: utf-8 -*-
+# FIXME: doesn't currently build on ppc64
+ExcludeArch: ppc64
 
 %define emacs21 1
 %define muleucs_ver current