--- a/sources/utility.h 2019-03-14 19:21:37.000000000 +0100
+++ b/sources/utility.h 2021-01-18 19:36:38.116292685 +0100
@@ -5,6 +5,7 @@
#include <memory>
#include <type_traits>
+#include <string>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>