diff --git a/packages/pynumaflow/examples/reducestream/counter/pipeline.yaml b/packages/pynumaflow/examples/reducestream/counter/pipeline.yaml
index 5ac746c9..afb70a65 100644
--- a/packages/pynumaflow/examples/reducestream/counter/pipeline.yaml
+++ b/packages/pynumaflow/examples/reducestream/counter/pipeline.yaml
@@ -30,6 +30,7 @@ spec:
           window:
             fixed:
               length: 60s
+              streaming: true
           keyed: true
           storage:
             persistentVolumeClaim: