diff --git a/runners/google-cloud-dataflow-java/worker/src/main/java/org/apache/beam/runners/dataflow/worker/ReifyTimestampAndWindowsParDoFnFactory.java b/runners/google-cloud-dataflow-java/worker/src/main/java/org/apache/beam/runners/dataflow/worker/ReifyTimestampAndWindowsParDoFnFactory.java
index 248ed34e8c40..746c09404f6e 100644
--- a/runners/google-cloud-dataflow-java/worker/src/main/java/org/apache/beam/runners/dataflow/worker/ReifyTimestampAndWindowsParDoFnFactory.java
+++ b/runners/google-cloud-dataflow-java/worker/src/main/java/org/apache/beam/runners/dataflow/worker/ReifyTimestampAndWindowsParDoFnFactory.java
@@ -87,9 +87,13 @@ public void processElement(Object untypedElem) throws Exception {
     public void processTimers() {}
 
     @Override
-    public void finishBundle() throws Exception {}
+    public void finishBundle() throws Exception {
+      this.receiver = null;
+    }
 
     @Override
-    public void abort() throws Exception {}
+    public void abort() throws Exception {
+      this.receiver = null;
+    }
   }
 }