diff --git a/parser.go b/parser.go
index 05d4ca2..d425df3 100644
--- a/parser.go
+++ b/parser.go
@@ -936,7 +936,6 @@ func (p *Parser) parseOperand() (expr Expr, err error) {
 	_, tok, lit := p.lex()
 	switch tok {
 	case VALUES:
-		// 左括号
 		_, tok, lit = p.lex()
 		var expr Expr
 		if tok == LP {
@@ -947,6 +946,8 @@ func (p *Parser) parseOperand() (expr Expr, err error) {
 				return nil, err
 			}
 			expr = expr.(*ParenExpr).X
+		} else {
+			return nil, p.errorExpected(p.pos, p.tok, "left paren")
 		}
 		return &Call{Name: &Ident{Name: "VALUES"}, Args: []Expr{expr}}, nil
 
diff --git a/parser_test.go b/parser_test.go
index 1373777..42e27fc 100644
--- a/parser_test.go
+++ b/parser_test.go
@@ -1,7 +1,6 @@
 package sqlparser_test
 
 import (
-	"fmt"
 	"strings"
 	"testing"
 
@@ -1023,7 +1022,24 @@ func TestSql_support_values_call(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
+
 	insert := stmt.(*sqlparser.InsertStatement)
 	result := insert.String()
-	fmt.Println(result)
+	expected := "INSERT INTO `daily_asset` (`trade_date`, `fund_account`, `client_id`, `day_income`, `hold_income`, `acc_income`, `day_income_ratio`, `acc_income_sw_ratio`, `acc_income_nav_ratio`, `market_value`, `fund_asset`, `total_asset`, `sw_total_net`, `bank_transfer_in`, `bank_transfer_out`, `acc_bank_transfer_in`, `acc_bank_transfer_out`, `net_in_balance`) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?) ON DUPLICATE KEY UPDATE `fund_asset` = VALUES(`fund_asset`), `hold_income` = VALUES(`hold_income`), `market_value` = VALUES(`market_value`), `total_asset` = VALUES(`total_asset`), `bank_transfer_in` = VALUES(`bank_transfer_in`), `bank_transfer_out` = VALUES(`bank_transfer_out`), `net_in_balance` = VALUES(`net_in_balance`)"
+	if result != expected {
+		t.Fatal("sql not equal")
+	}
+}
+
+func TestSql_support_values_error(t *testing.T) {
+	sql := "INSERT INTO `daily_asset` (`trade_date`,`fund_account`,`client_id`,`day_income`,`hold_income`,`acc_income`,`day_income_ratio`,`acc_income_sw_ratio`,`acc_income_nav_ratio`,`market_value`,`fund_asset`,`total_asset`,`sw_total_net`,`bank_transfer_in`,`bank_transfer_out`,`acc_bank_transfer_in`,`acc_bank_transfer_out`,`net_in_balance`) VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?) ON DUPLICATE KEY UPDATE `fund_asset`=VALUES `fund_asset`"
+	_, err := sqlparser.NewParser(strings.NewReader(sql)).ParseStatement()
+	if err == nil {
+		t.Fatal(err)
+	}
+	msg := err.Error()
+	expected := "1:422: expected left paren, found `fund_asset`"
+	if msg != expected {
+		t.Fatal("err msg not equal")
+	}
 }