diff --git a/lorax.spec b/lorax.spec
index d0946df6..9113ccdd 100644
--- a/lorax.spec
+++ b/lorax.spec
@@ -25,11 +25,11 @@ Requires:       genisoimage
 Requires:       parted
 Requires:       pyliblzma
 
-%ifarch i386 x86_64
+%ifarch %{ix86} x86_64
 Requires:       syslinux
 %endif
 
-%ifarch sparc sparc64
+%ifarch %{sparc}
 Requires:       silo
 %endif