--- old/src/share/vm/memory/generation.hpp	2014-04-29 16:54:45.000000000 -0400
+++ new/src/share/vm/memory/generation.hpp	2014-04-29 16:54:44.000000000 -0400
@@ -422,7 +422,7 @@
     // have to guard against non-monotonicity.
     NOT_PRODUCT(
       if (now < _time_of_last_gc) {
-        warning("time warp: "INT64_FORMAT" to "INT64_FORMAT, _time_of_last_gc, now);
+        warning("time warp: "INT64_FORMAT" to "INT64_FORMAT, (int64_t)_time_of_last_gc, (int64_t)now);
       }
     )
     return _time_of_last_gc;