diff --git a/xCAT/postscripts/confignetwork b/xCAT/postscripts/confignetwork
index 59862e336..4c61ceeed 100755
--- a/xCAT/postscripts/confignetwork
+++ b/xCAT/postscripts/confignetwork
@@ -366,6 +366,7 @@ function sort_nics_device_order {
             #find nicdevice type as base_nic_type
             base_nic_dev=`echo "$nics_list" |sed -n "${num}p"|awk '{print $2}'`
             if echo "$base_nic_dev"|grep "@" >/dev/null; then
+                temp_base_nic_type_one=''
                 for i in `echo "$base_nic_dev" |sed 's/@/ /g'`
                 do
                     temp_base_nic_type=`find_nic_type "$i" | $utolcmd`