diff --git a/src/helpers/common.ts b/src/helpers/common.ts
index c225170..2a4e6f2 100644
--- a/src/helpers/common.ts
+++ b/src/helpers/common.ts
@@ -165,7 +165,7 @@ export default class CommonHelper {
         }
         let whereAttr = '';
         if (whereAttrPre.length > 0) {
-            whereAttr = whereAttrPre.join(' and ') + (whereAttrPre.length > 0 && param.additional_where != '' ? ' and ' : '') + param.additional_where;
+            whereAttr = whereAttrPre.join(' and ') + (whereAttrPre.length > 0 && param.additional_where != '' ? ' and ' : '') + (param.additional_where ?? '');
         } else {
             whereAttr += param.additional_where;
         }