--- libs/typesystem.h.orig	2018-10-06 15:03:20 UTC
+++ libs/typesystem.h
@@ -24,6 +24,7 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
 
 
 #include <list>
+#include <memory>
 #include "generic/callback.h"
 #include "generic/static.h"