diff --git a/muduo/base/tests/Date_unittest.cc b/muduo/base/tests/Date_unittest.cc
index bf2d3862d..e0c845301 100644
--- a/muduo/base/tests/Date_unittest.cc
+++ b/muduo/base/tests/Date_unittest.cc
@@ -1,6 +1,7 @@
 #include "muduo/base/Date.h"
 #include <assert.h>
 #include <stdio.h>
+#include <time.h>
 
 using muduo::Date;