--- lexical_cast.hpp.orig	Thu Sep 16 06:23:30 2004
+++ lexical_cast.hpp	Thu Apr 14 13:26:34 2005
@@ -190,6 +190,17 @@
             throw_exception(bad_lexical_cast(typeid(Target), typeid(Source)));
         return result;
     }
+
+    template<typename Target, typename Source>
+    Target lexical_cast(Source arg, Target defaultValue)
+    {
+        detail::lexical_stream<Target, Source> interpreter;
+        Target result;
+
+        if(!(interpreter << arg && interpreter >> result))
+            return defaultValue;
+        return result;
+    }
 }
 
 // Copyright Kevlin Henney, 2000-2003. All rights reserved.