diff --git a/velox/experimental/wave/common/tests/HashTestUtil.h b/velox/experimental/wave/common/tests/HashTestUtil.h
index 43703f977127..ddebee017f41 100644
--- a/velox/experimental/wave/common/tests/HashTestUtil.h
+++ b/velox/experimental/wave/common/tests/HashTestUtil.h
@@ -17,6 +17,7 @@
 #pragma once
 
 #include <memory>
+#include <string>
 #include "velox/experimental/wave/common/Buffer.h"
 #include "velox/experimental/wave/common/HashTable.h"