diff --git a/bin/tadah.cpp b/bin/tadah.cpp
index d2d88e9f643203061d2bfe2ccdbf46ef7bf4c229..8fdc39625984099cf1e69df49a637375e8147b1d 100644
--- a/bin/tadah.cpp
+++ b/bin/tadah.cpp
@@ -11,6 +11,7 @@
 #include "../MLIP/nn_finder.h"
 #include "../MLIP/analytics/analytics.h"
 #include "../MLIP/version.h"
+#include "../HPO/hpo.h"
 
 #include <iostream>
 #include <stdexcept>