diff --git a/business/auth2/auth2.go b/business/auth2/auth2.go
index e45dac501..bd5ea8ac4 100644
--- a/business/auth2/auth2.go
+++ b/business/auth2/auth2.go
@@ -362,7 +362,7 @@ func GetTokenType(token string) (tokenType int) {
 
 func IsV2Token(token string) bool {
 	tokenPartList := strings.Split(token, TokenTypeSep)
-	return tokenPartList[0] == TokenVer
+	return tokenPartList[1] == TokenVer
 }
 
 func GuessAuthTypeFromAuthID(authID string) (authType string) {