diff --git a/functions/node8/index.js b/functions/node8/index.js
index 1f64459173..91e3ca89f9 100644
--- a/functions/node8/index.js
+++ b/functions/node8/index.js
@@ -91,6 +91,7 @@ exports.helloPubSub = (pubSubEvent, context) => {
     : 'World';
 
   console.log(`Hello, ${name}!`);
+  return;
 };
 // [END functions_helloworld_pubsub_node8]