diff --git a/omr-6in4/files/etc/init.d/omr-6in4 b/omr-6in4/files/etc/init.d/omr-6in4
index 853bb30ca..a7f1f8792 100755
--- a/omr-6in4/files/etc/init.d/omr-6in4
+++ b/omr-6in4/files/etc/init.d/omr-6in4
@@ -17,7 +17,7 @@ set_shadowsocks_address() {
 set_ipv6_state() {
 	local disable_ipv6="$(uci -q get openmptcprouter.settings.disable_ipv6)"
 	[ -z "$disable_ipv6" ] && disable_ipv6="1"
-	sysctl -w net.ipv6.conf.all.disable_ipv6=$disable_ipv6
+	sysctl -qw net.ipv6.conf.all.disable_ipv6=$disable_ipv6
 	sed -i "s:^net.ipv6.conf.all.disable_ipv6=[0-9]*:net.ipv6.conf.all.disable_ipv6=$disable_ipv6:" /etc/sysctl.d/zzz_openmptcprouter.conf
 
 	uci -q batch <<-EOF >/dev/null