--- a/src/pugiconfig.hpp
+++ b/src/pugiconfig.hpp
@@ -44,7 +44,7 @@
 // #define PUGIXML_HEADER_ONLY
 
 // Uncomment this to enable long long support
-// #define PUGIXML_HAS_LONG_LONG
+#define PUGIXML_HAS_LONG_LONG
 
 #endif