diff --git a/test/cpp/util/grpc_cli.cc b/test/cpp/util/grpc_cli.cc
index 0e1eab16773a8e71ba4c35064707ee76e2433fef..8e001cc0f50ef5bf50f2dcca4397d8dfc2d2273f 100644
--- a/test/cpp/util/grpc_cli.cc
+++ b/test/cpp/util/grpc_cli.cc
@@ -160,6 +160,7 @@ int main(int argc, char** argv) {
               << std::endl;
   }
   grpc::string server_address(argv[2]);
+  grpc::string method(argv[3]);
 
   if (FLAGS_input_binary_file.empty()) {
     std::cout << "Missing --input_binary_file for serialized request."