--- src/xalanc/XSLT/FunctionSystemProperty.cpp.orig	2020-06-07 19:17:25.000000000 +1000
+++ src/xalanc/XSLT/FunctionSystemProperty.cpp	2022-12-14 21:13:51.000000000 +1100
@@ -34,6 +34,7 @@
 #include <xalanc/XPath/XalanQName.hpp>
 #include <xalanc/XPath/XObjectFactory.hpp>
 
+#include <cstdlib>
 
 
 namespace XALAN_CPP_NAMESPACE {