diff --git a/yajsapi/rest/activity.ts b/yajsapi/rest/activity.ts
index 5deb20ac7..a54f0c9e1 100755
--- a/yajsapi/rest/activity.ts
+++ b/yajsapi/rest/activity.ts
@@ -438,7 +438,7 @@ class PollingBatch extends Batch {
         let { data } = await this.api.getExecBatchResults(
           this.activity_id,
           this.batch_id,
-          undefined,
+          last_idx,
           5,
           { timeout: 6000 }
         );