diff --git a/libgnucash/engine/gnc-option-impl.hpp b/libgnucash/engine/gnc-option-impl.hpp
index 4ebaa36..4d157d5 100644
--- a/libgnucash/engine/gnc-option-impl.hpp
+++ b/libgnucash/engine/gnc-option-impl.hpp
@@ -49,6 +49,7 @@
 #include <variant>
 #include <iostream>
 #include <limits>
+#include <algorithm>
 
 #include "gnc-option-uitype.hpp"