Index: src/lib/asiodns/io_fetch.cc
--- src/lib/asiodns/io_fetch.cc.orig
+++ src/lib/asiodns/io_fetch.cc
@@ -22,6 +22,7 @@
 #include <dns/rcode.h>
 #include <util/buffer.h>
 
+#include <boost/asio/deadline_timer.hpp>
 #include <boost/scoped_ptr.hpp>
 #include <boost/date_time/posix_time/posix_time_types.hpp>
 
