diff --git a/doc/src_code/insensitive.cpp b/doc/src_code/insensitive.cpp
index 8cf29f1b..5e344177 100644
--- a/doc/src_code/insensitive.cpp
+++ b/doc/src_code/insensitive.cpp
@@ -14,7 +14,7 @@
         bool operator()(std::string const& x,
             std::string const& y) const
         {
-            return boost::algorithm::iequals(x, y);
+            return boost::algorithm::iequals(x, y, std::locale());
         }
     };
 
@@ -24,11 +24,12 @@
         std::size_t operator()(std::string const& x) const
         {
             std::size_t seed = 0;
+            std::locale locale;
 
             for(std::string::const_iterator it = x.begin();
                 it != x.end(); ++it)
             {
-                boost::hash_combine(seed, std::toupper(*it));
+                boost::hash_combine(seed, std::toupper(*it, locale));
             }
 
             return seed;