diff --git a/xCAT-server/share/xcat/scripts/genduiduuid.sh b/xCAT-server/share/xcat/scripts/genduiduuid.sh
index 8961325d1..1cfa20dfa 100644
--- a/xCAT-server/share/xcat/scripts/genduiduuid.sh
+++ b/xCAT-server/share/xcat/scripts/genduiduuid.sh
@@ -3,7 +3,7 @@ if [ ! -r /etc/redhat-release ] || ! grep "release 6" /etc/redhat-release >/dev/
 fi
 if [ -r /sys/devices/virtual/dmi/id/product_uuid ]; then 
     duid='default-duid "\000\004';
-    for i in `dmidecode -s system-uuid | sed -e s/-//g -e 's/\(..\)/\1 /g'`; do
+    for i in `sed -e 's/\(..\)\(..\)\(..\)\(..\)-\(..\)\(..\)-\(..\)\(..\)/\4\3\2\1-\6\5-\8\7/;s/-//g;s/\(..\)/\1 /g' /sys/devices/virtual/dmi/id/product_uuid`; do
         num=`printf "%d" 0x$i`
         octnum=`printf "\\%03o" 0x$i`
 #Instead of hoping to be inside printable case, just make them all octal codes