diff --git a/firefox.spec b/firefox.spec
index d525c95..c773a80 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -1,5 +1,5 @@
 # Separated plugins are supported on x86(64) only
-%ifarch i386 i686 x86_64
+%ifarch %{ix86} x86_64
 %define separated_plugins 1
 %else
 %define separated_plugins 0