diff --git a/pdns/lua-record.cc b/pdns/lua-record.cc
index f7f3ef0..70a961b 100644
--- a/pdns/lua-record.cc
+++ b/pdns/lua-record.cc
@@ -1,3 +1,4 @@
+#include <thread>
#include <future>
#include <mutex>
#include <boost/format.hpp>