diff --git a/test/cpp/qps/client_async.cc b/test/cpp/qps/client_async.cc
index 05756f0563cdf8f2c669d55463d31e8bdbbe7edd..63da1e719d3ef88c439d9180adcf65d4115ebc56 100644
--- a/test/cpp/qps/client_async.cc
+++ b/test/cpp/qps/client_async.cc
@@ -209,7 +209,7 @@ class AsyncClient : public ClientImpl<StubType, RequestType> {
     }
   }
 
-  int GetPollCount() {
+  int GetPollCount() override {
     int count = 0;
     for (auto cq = cli_cqs_.begin(); cq != cli_cqs_.end(); cq++) {
       count += (int)grpc_get_cq_poll_num((*cq)->cq());
diff --git a/test/cpp/qps/server_async.cc b/test/cpp/qps/server_async.cc
index 7d00cb33dce0530b5039cf536efdca42af5999d2..57f45d325feb156ab98f99c16c0dc2fcd49fd3c5 100644
--- a/test/cpp/qps/server_async.cc
+++ b/test/cpp/qps/server_async.cc
@@ -158,7 +158,7 @@ class AsyncQpsServerTest final : public grpc::testing::Server {
     shutdown_thread.join();
   }
 
-  int GetPollCount() {
+  int GetPollCount() override {
     int count = 0;
     for (auto cq = srv_cqs_.begin(); cq != srv_cqs_.end(); cq++) {
       count += (int)grpc_get_cq_poll_num((*cq)->cq());