diff --git a/test/cpp/qps/client_async.cc b/test/cpp/qps/client_async.cc
index 24f4ac696862d7cae16ac309f2836d91f5932ee5..a897c28dc7f3cd38cad900cb973056dcc9f847c0 100644
--- a/test/cpp/qps/client_async.cc
+++ b/test/cpp/qps/client_async.cc
@@ -188,7 +188,7 @@ static void RunTest(const int client_threads, const int client_channels,
   }
 
   std::vector<std::thread> threads;  // Will add threads when ready to execute
-  std::vector<::gpr_histogram *> thread_stats(client_threads);
+  std::vector< ::gpr_histogram *> thread_stats(client_threads);
 
   TestService::Stub *stub_stats = channels[0].get_stub();
   grpc::ClientContext context_stats_begin;