diff --git a/mace/ops/pad_test.cc b/mace/ops/pad_test.cc
index 4995cbcc1733449d150f13e97cff49851100f39d..158e58f50314e2ed17b2e864a581cd5f0024f550 100644
--- a/mace/ops/pad_test.cc
+++ b/mace/ops/pad_test.cc
@@ -14,6 +14,9 @@
 
 #include "mace/ops/ops_test_util.h"
 #include "mace/ops/pad.h"
+#include <functional>
+#include <string>
+#include <vector>
 
 namespace mace {
 namespace ops {