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path: root/PythiaHandler.patch
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--- a/tools/fritz/include/pythiahandler/PythiaHandler.h
+++ b/tools/fritz/include/pythiahandler/PythiaHandler.h
@@ -1,6 +1,7 @@
 #ifndef _PYTHIAHANDLER
 #define _PYTHIAHANDLER
 
+#include <cstddef>
 #include "Pythia8/Pythia.h"
 
 #ifdef HAVE_HEPMC