--- C:/Boost/include/boost/date_time/filetime_functions.hpp	Mon Feb 23 11:26:48 2009
+++ C:/boost_1_38_0/boost/date_time/filetime_functions.hpp	Fri Feb 27 16:36:15 2009
@@ -96,8 +96,8 @@
     {
         /* shift is difference between 1970-Jan-01 & 1601-Jan-01
         * in 100-nanosecond intervals */
-        const uint64_t c1 = 27111902UL;
-        const uint64_t c2 = 3577643008UL; // issues warning without 'UL'
+        const uint64_t c1 = static_cast<uint64_t>(27111902UL);
+        const uint64_t c2 = static_cast<uint64_t>(3577643008UL); // issues warning without 'UL'
         const uint64_t shift = (c1 << 32) + c2;
 
         union {