diff --git a/projects/nat-archive-tool/cpp.hxml b/projects/nat-archive-tool/cpp.hxml
index 682008c0..bf05a322 100644
--- a/projects/nat-archive-tool/cpp.hxml
+++ b/projects/nat-archive-tool/cpp.hxml
@@ -1,2 +1,3 @@
+-lib hxcpp
 --cpp bin/cpp
 --cmd bash test-cpp.sh 
\ No newline at end of file