1 files changed, 3 insertions, 0 deletions
diff --git a/trie.cpp b/trie.cpp
index a1571341..31274975 100644
--- a/trie.cpp
+++ b/trie.cpp
@@ -22,8 +22,11 @@
 
 #include <fstream>
 #include <random>
+
+// Make sure boost/asio.hpp is included before windows.h.
 #include <boost/asio.hpp>
 #include <boost/test/unit_test.hpp>
+
 #include "JsonSpiritHeaders.h"
 #include <libdevcore/CommonIO.h>
 #include <libdevcrypto/TrieDB.h>