diff --git a/session.go b/session.go
index 1e3e9c19..50431043 100644
--- a/session.go
+++ b/session.go
@@ -2871,7 +2871,7 @@ func (session *Session) Update(bean interface{}, condiBean ...interface{}) (int6
 
 	if session.Statement.UseAutoTime && table.Updated != "" {
 		colNames = append(colNames, session.Engine.Quote(table.Updated)+" = ?")
-		args = append(args, session.Engine.NowTime(table.Columns[table.Updated].SQLType.Name))
+		args = append(args, session.Engine.NowTime(table.Columns[strings.ToLower(table.Updated)].SQLType.Name))
 	}
 
 	var condiColNames []string