diff --git a/README.md b/README.md
index f5629b1f341..c46240b9c2f 100644
--- a/README.md
+++ b/README.md
@@ -109,7 +109,7 @@ Make sure that your `$GOPATH/bin` is in your `$PATH`.
      protoc -I/usr/local/include -I. \
        -I$GOPATH/src \
        -I$GOPATH/src/github.com/grpc-ecosystem/grpc-gateway/third_party/googleapis \
-       --plugin=protoc-gen-grpc-ruby=grpc_ruby_plugin \
+       --plugin=protoc-gen-grpc=grpc_ruby_plugin \
        --grpc-ruby_out=. \
        path/to/your/service.proto
      ```