diff --git a/common/linux_iphelper.sh b/common/linux_iphelper.sh
index a392083..b7dc0db 100644
--- a/common/linux_iphelper.sh
+++ b/common/linux_iphelper.sh
@@ -4,6 +4,8 @@
 # PREROUTING - can't DNAT to ::1. can DNAT to link local of -i interface or to any global addr
 # not a good idea to expose tpws to the world (bind to ::)
 
+# max wait time for the link local ipv6 on the LAN interface
+LINKLOCAL_WAIT_SEC=${LINKLOCAL_WAIT_SEC:-5}
 
 get_ipv6_linklocal()
 {
diff --git a/init.d/openwrt/functions b/init.d/openwrt/functions
index 7424723..cb0f0c1 100644
--- a/init.d/openwrt/functions
+++ b/init.d/openwrt/functions
@@ -25,9 +25,6 @@ CUSTOM_DIR="$ZAPRET_RW/init.d/openwrt"
 
 TPWS_LOCALHOST4=127.0.0.127
 
-# max wait time for the link local ipv6 on the LAN interface
-LINKLOCAL_WAIT_SEC=5
-
 IPSET_CR="$ZAPRET_BASE/ipset/create_ipset.sh"
 
 # can be multiple ipv6 outgoing interfaces
diff --git a/init.d/sysv/functions b/init.d/sysv/functions
index bfa3d99..59e488e 100644
--- a/init.d/sysv/functions
+++ b/init.d/sysv/functions
@@ -90,9 +90,6 @@ TPWS_WAIT_SOCKS6="$TPWS_WAIT --bind-wait-ip-linklocal=30"
 # first wait for lan to ifup, then wait for bind-wait-ip-linklocal seconds for link local address and bind-wait-ip for any ipv6 as the worst case
 TPWS_OPT_BASE6_PRE="--bind-linklocal=prefer $TPWS_WAIT --bind-wait-ip-linklocal=3"
 
-# max wait time for the link local ipv6 on the LAN interface
-LINKLOCAL_WAIT_SEC=5
-
 dnat6_target()
 {
 	_dnat6_target "$@"