diff --git a/test/cpp/qps/qps_json_driver.cc b/test/cpp/qps/qps_json_driver.cc
index ddaaa7ca75e1a83ce06940802a1093b50637cc69..bd2c1f0ec674becf12759f8153bdc5c7eb347ddf 100644
--- a/test/cpp/qps/qps_json_driver.cc
+++ b/test/cpp/qps/qps_json_driver.cc
@@ -31,6 +31,7 @@
  *
  */
 
+#include <iostream>
 #include <memory>
 #include <set>