diff --git a/default.inc b/default.inc
index 83823fa..280a4cb 100755
--- a/default.inc
+++ b/default.inc
@@ -61,7 +61,7 @@ redhat_derivative () {
 
 detect_os () {
 	local -n myresult="$1" || return 1
-	echo MACH=$MACH
+	echo MACH=`uname -m`
 	if [ -f /etc/redhat-release ] ; then
 		echo DISTRIBUTION=redhat
         echo FAMILY=rh