--- a/src/openms/include/OpenMS/DATASTRUCTURES/ParamValue.orig.h 2021-09-16 17:17:42.000000000 +0200
+++ b/src/openms/include/OpenMS/DATASTRUCTURES/ParamValue.h 2021-09-18 16:24:53.753080982 +0200
@@ -37,6 +37,7 @@
#include <string>
#include <vector>
+#include <cstddef>
namespace OpenMS
{