diff --git a/unittest/TestThreadManager.cpp b/unittest/TestThreadManager.cpp
index f6a11f2fa363..10a8b581b768 100644
--- a/unittest/TestThreadManager.cpp
+++ b/unittest/TestThreadManager.cpp
@@ -1,5 +1,6 @@
 #include <thread>
 #include <vector>
+#include <cstdio>
 
 #include "Common/Log.h"
 #include "Common/TimeUtil.h"