--- boost-1_35/boost/date_time/time.hpp	2008-04-07 09:06:26.000000000 -0700
+++ boost-1_35/boost/date_time/time.hpp	2008-04-07 09:18:14.000000000 -0700
@@ -77,14 +77,14 @@
     /*! Optional bool parameter will return time zone as an offset 
      * (ie "+07:00"). Empty string is returned for classes that do 
      * not use a time_zone */
-    std::string zone_name(bool as_offset=false) const
+    std::string zone_name(bool /*as_offset*/=false) const
     {
       return time_system::zone_name(time_);
     }
     /*! Optional bool parameter will return time zone as an offset 
      * (ie "+07:00"). Empty string is returned for classes that do 
      * not use a time_zone */
-    std::string zone_abbrev(bool as_offset=false) const
+    std::string zone_abbrev(bool /*as_offset*/=false) const
     {
       return time_system::zone_name(time_);
     }