--- a/boost/property_tree/detail/ptree_utils.hpp	
+++ a/boost/property_tree/detail/ptree_utils.hpp	
@@ -13,6 +13,7 @@ 
 #include <string>
 #include <algorithm>
 #include <locale>
+#include <limits>
 
 namespace boost { namespace property_tree { namespace detail
 {