diff --git a/src/helpers/dynamicQueryBuilder.ts b/src/helpers/dynamicQueryBuilder.ts
index 43d44c5..6bab2dc 100644
--- a/src/helpers/dynamicQueryBuilder.ts
+++ b/src/helpers/dynamicQueryBuilder.ts
@@ -121,7 +121,7 @@ export default abstract class DynamicQueryBuilder {
           query.orWhere(whereClause.query, whereClause.parameters);
         }
       } else {
-        if (condition.concat == "AND") {
+        if (condition.concat == "_" || condition.concat == "AND") {
           query.andWhere(
             condition.invert == undefined || condition.invert == true
               ? new Brackets((qb) => {