diff --git a/NetDb.h b/NetDb.h
index 7988276a..81cf6582 100644
--- a/NetDb.h
+++ b/NetDb.h
@@ -6,6 +6,7 @@
 #include <map>
 #include <string>
 #include <thread>
+#include <boost/filesystem.hpp>
 #include "Queue.h"
 #include "I2NPProtocol.h"
 #include "RouterInfo.h"