diff --git a/microcode_ctl.spec b/microcode_ctl.spec
index 670a16d..c7fd750 100644
--- a/microcode_ctl.spec
+++ b/microcode_ctl.spec
@@ -15,7 +15,7 @@ Buildroot:      %{_tmppath}/%{name}-%{version}-root
 Requires(pre):  /sbin/chkconfig /sbin/service
 Requires(pre):  grep gawk coreutils
 Obsoletes:      kernel-utils
-ExclusiveArch:  i586 x86_64
+ExclusiveArch:  %{ix86} x86_64
 
 Patch1: microcode_ctl.patch