Update cpptutorial.md
Fixed incorrect description on client side streaming.
diff --git a/cpp/cpptutorial.md b/cpp/cpptutorial.md
index 9cd76fa..ec4584f 100644
--- a/cpp/cpptutorial.md
+++ b/cpp/cpptutorial.md
@@ -60,7 +60,7 @@
rpc ListFeatures(Rectangle) returns (stream Feature) {}
```
-- A *client-side streaming RPC* where the client writes a sequence of messages and sends them to the server, again using a provided stream. Once the client has finished writing the messages, it waits for the server to read them all and return its response. You specify a server-side streaming method by placing the `stream` keyword before the *request* type.
+- A *client-side streaming RPC* where the client writes a sequence of messages and sends them to the server, again using a provided stream. Once the client has finished writing the messages, it waits for the server to read them all and return its response. You specify a client-side streaming method by placing the `stream` keyword before the *request* type.
```
// Accepts a stream of Points on a route being traversed, returning a
// RouteSummary when traversal is completed.