diff --git a/samples/snippets/create_http_task.py b/samples/snippets/create_http_task.py
index 13057fa8..a789c4ee 100644
--- a/samples/snippets/create_http_task.py
+++ b/samples/snippets/create_http_task.py
@@ -90,7 +90,8 @@ def create_http_task(
     if deadline is not None:
         # Add dispatch deadline for requests sent to the worker.
         duration = duration_pb2.Duration()
-        task["dispatch_deadline"] = duration.FromSeconds(deadline)
+        duration.FromSeconds(deadline)
+        task["dispatch_deadline"] = duration
 
     # Use the client to build and send the task.
     response = client.create_task(request={"parent": parent, "task": task})