--- utils/asymptote/LspCpp/include/LibLsp/lsp/SimpleTimer.h.orig
+++ utils/asymptote/LspCpp/include/LibLsp/lsp/SimpleTimer.h
@@ -3,6 +3,7 @@
 #include <atomic>
 #include <functional>
 #include <boost/asio.hpp>
+#include <boost/asio/deadline_timer.hpp>
 
 template<typename Duration = boost::posix_time::milliseconds>
 class SimpleTimer