diff --git a/tests/unit-tests/bench.t.cpp b/tests/unit-tests/bench.t.cpp
index 44e5ac5..54fc7d7 100644
--- a/tests/unit-tests/bench.t.cpp
+++ b/tests/unit-tests/bench.t.cpp
@@ -24,6 +24,8 @@
 #include "requester.hpp"
 #include "test-common.hpp"
 
+#include <iostream>
+
 namespace ndn {
 namespace ndncert {
 namespace tests {