diff --git a/library/think/db/Connection.php b/library/think/db/Connection.php
index f927acd0..aa8e221c 100644
--- a/library/think/db/Connection.php
+++ b/library/think/db/Connection.php
@@ -94,7 +94,7 @@ abstract class Connection
         // 是否严格检查字段是否存在
         'fields_strict'  => true,
         // 数据集返回类型
-        'resultset_type' => Db::RESULTSET_ARRAY,
+        'resultset_type' => 'array',
         // 自动写入时间戳字段
         'auto_timestamp' => false,
         // 是否需要进行SQL性能分析