diff --git a/test/beast/zlib/deflate_stream.cpp b/test/beast/zlib/deflate_stream.cpp
index faf6ffc2..a9b0d162 100644
--- a/test/beast/zlib/deflate_stream.cpp
+++ b/test/beast/zlib/deflate_stream.cpp
@@ -12,7 +12,9 @@
 
 #include <boost/beast/core/string.hpp>
 #include <boost/beast/_experimental/unit_test/suite.hpp>
+#include <array>
 #include <cstdint>
+#include <numeric>
 #include <random>
 
 #include "zlib-1.2.11/zlib.h"