--- a/copasi/plotUI/CQMarchingSquares.orig.cpp	2023-11-21 00:26:09.000000000 +0100
+++ b/copasi/plotUI/CQMarchingSquares.cpp	2023-11-24 22:04:22.224510401 +0100
@@ -4,6 +4,7 @@
 // All rights reserved.
 
 #include "CQMarchingSquares.h"
+#include <vector>
 
 #if defined(COPASI_USE_QCUSTOMPLOT)