diff --git a/ap/app/Script/scripts/lan.sh b/ap/app/Script/scripts/lan.sh
index a1c74d1..6c471e9 100755
--- a/ap/app/Script/scripts/lan.sh
+++ b/ap/app/Script/scripts/lan.sh
@@ -71,7 +71,7 @@
     webv6_enable=`nv get webv6_enable`
     ipv6=`nv get lan_ipv6addr`
     if [ "x$webv6_enable" == "x1" ]; then
-        ifconfig $lan_if $ipv6
+        ifconfig $lan_if $ipv6/64
     if [ $? -ne 0 ];then
         echo "Error: ifconfig $lan_if $ipv6 failed." >> $test_log
     fi