diff --git a/proxy/shadowsocks/config.go b/proxy/shadowsocks/config.go
index 8b59986ed..48bb12689 100644
--- a/proxy/shadowsocks/config.go
+++ b/proxy/shadowsocks/config.go
@@ -95,7 +95,7 @@ func (a *Account) AsAccount() (protocol.Account, error) {
 		Cipher: Cipher,
 		Key:    passwordToCipherKey([]byte(a.Password), Cipher.KeySize()),
 		replayFilter: func() antireplay.GeneralizedReplayFilter {
-			if a.ReplayProtection {
+			if a.IvCheck {
 				return antireplay.NewReplayFilter(300)
 			}
 			return nil
diff --git a/proxy/shadowsocks/config.pb.go b/proxy/shadowsocks/config.pb.go
index e4109adaa..3f703068f 100644
--- a/proxy/shadowsocks/config.pb.go
+++ b/proxy/shadowsocks/config.pb.go
@@ -87,9 +87,9 @@ type Account struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	Password         string     `protobuf:"bytes,1,opt,name=password,proto3" json:"password,omitempty"`
-	CipherType       CipherType `protobuf:"varint,2,opt,name=cipher_type,json=cipherType,proto3,enum=v2ray.core.proxy.shadowsocks.CipherType" json:"cipher_type,omitempty"`
-	ReplayProtection bool       `protobuf:"varint,3,opt,name=replay_protection,json=replayProtection,proto3" json:"replay_protection,omitempty"`
+	Password   string     `protobuf:"bytes,1,opt,name=password,proto3" json:"password,omitempty"`
+	CipherType CipherType `protobuf:"varint,2,opt,name=cipher_type,json=cipherType,proto3,enum=v2ray.core.proxy.shadowsocks.CipherType" json:"cipher_type,omitempty"`
+	IvCheck    bool       `protobuf:"varint,3,opt,name=iv_check,json=ivCheck,proto3" json:"iv_check,omitempty"`
 }
 
 func (x *Account) Reset() {
@@ -138,9 +138,9 @@ func (x *Account) GetCipherType() CipherType {
 	return CipherType_UNKNOWN
 }
 
-func (x *Account) GetReplayProtection() bool {
+func (x *Account) GetIvCheck() bool {
 	if x != nil {
-		return x.ReplayProtection
+		return x.IvCheck
 	}
 	return false
 }
@@ -272,46 +272,45 @@ var file_proxy_shadowsocks_config_proto_rawDesc = []byte{
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 }
 
 var (
diff --git a/proxy/shadowsocks/config.proto b/proxy/shadowsocks/config.proto
index f96ada255..e4e7a22b3 100644
--- a/proxy/shadowsocks/config.proto
+++ b/proxy/shadowsocks/config.proto
@@ -14,7 +14,7 @@ message Account {
   string password = 1;
   CipherType cipher_type = 2;
 
-  bool replay_protection = 3;
+  bool iv_check = 3;
 }
 
 enum CipherType {