diff --git a/dbpool.go b/dbpool.go
index faa00d6..6e3cbd0 100644
--- a/dbpool.go
+++ b/dbpool.go
@@ -275,7 +275,7 @@ func (this *dbPool) internalQuery(dataSource string, sql string, params []string
 	cb QueryResultCb) {
 	ds := this.borrowConn(dataSource)
 	if ds == nil {
-		cb(errors.New("borrowConn error"), int64(0), int64(0))
+		cb(errors.New("borrowConn error"), nil)
 		return
 	}
 	rows, err := ds.conn.Query(sql, q5.ToInterfaces(params)...)
@@ -295,7 +295,7 @@ func (this *dbPool) internalQueryOne(dataSource string, sql string, params []str
 	cb QueryOneCb) {
 	ds := this.borrowConn(dataSource)
 	if ds == nil {
-		cb(errors.New("borrowConn error"), int64(0), int64(0))
+		cb(errors.New("borrowConn error"), nil)
 		return
 	}
 	rows, err := ds.conn.Query(sql, q5.ToInterfaces(params)...)