Fixing cpp examples.
diff --git a/examples/cpp/helloworld/README.md b/examples/cpp/helloworld/README.md
index b16c084..7a7194d 100644
--- a/examples/cpp/helloworld/README.md
+++ b/examples/cpp/helloworld/README.md
@@ -94,7 +94,7 @@
   arguments as follows
 
     ```
-    auto channel = CreateChannel("localhost:50051", InsecureCredentials());
+    auto channel = CreateChannel("localhost:50051", InsecureChannelCredentials());
     ```
 
 - Create a stub. A stub implements the rpc methods of a service and in the