diff --git a/proxy/vmess/validator.go b/proxy/vmess/validator.go
index 00d14d44..1682300f 100644
--- a/proxy/vmess/validator.go
+++ b/proxy/vmess/validator.go
@@ -130,7 +130,7 @@ func (v *TimedUserValidator) Add(u *protocol.MemoryUser) error {
 
 	if v.behaviorFused == false {
 		account := uu.user.Account.(*MemoryAccount)
-		crc64.Update(v.behaviorSeed, crc64.MakeTable(crc64.ECMA), account.ID.Bytes())
+		v.behaviorSeed = crc64.Update(v.behaviorSeed, crc64.MakeTable(crc64.ECMA), account.ID.Bytes())
 	}
 
 	return nil