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