diff --git a/tests/test-data.cpp b/tests/test-data.cpp
index 2e022a1..bfb2cd4 100644
--- a/tests/test-data.cpp
+++ b/tests/test-data.cpp
@@ -13,6 +13,7 @@
 #include "data.hpp"
 #include "security/key-chain.hpp"
 #include "security/cryptopp.hpp"
+#include "encoding/buffer-stream.hpp"
 
 #include "boost-test.hpp"