diff --git a/v2ray-core/files/usr/bin/v2ray-rules b/v2ray-core/files/usr/bin/v2ray-rules
index 695f2819d..982ef92f2 100755
--- a/v2ray-core/files/usr/bin/v2ray-rules
+++ b/v2ray-core/files/usr/bin/v2ray-rules
@@ -275,7 +275,7 @@ v2r_rules_iptchains_mkprerules() {
 	local proto="$1"
 
 	if [ -z "$o_ifnames" ]; then
-		echo "-I PREROUTING 1 -p $proto -j v2r_${rule}_pre_src"
+		echo "-A PREROUTING -p $proto -j v2r_${rule}_pre_src"
 	else
 		echo $o_ifnames \
 			| tr ' ' '\n' \
diff --git a/v2ray-core/files/usr/bin/v2ray-rules6 b/v2ray-core/files/usr/bin/v2ray-rules6
index 952d64b04..fdc383586 100755
--- a/v2ray-core/files/usr/bin/v2ray-rules6
+++ b/v2ray-core/files/usr/bin/v2ray-rules6
@@ -266,7 +266,7 @@ v2ray_rules6_iptchains_mkprerules() {
 	local proto="$1"
 
 	if [ -z "$o_ifnames" ]; then
-		echo "-I PREROUTING 1 -p $proto -j v2r6_${rule}_pre_src"
+		echo "-A PREROUTING -p $proto -j v2r6_${rule}_pre_src"
 	else
 		echo $o_ifnames \
 			| tr ' ' '\n' \