--- old/src/hotspot/share/gc/z/zStat.hpp	2018-03-06 16:38:51.752388542 +0100
+++ new/src/hotspot/share/gc/z/zStat.hpp	2018-03-06 16:38:51.584381334 +0100
@@ -343,14 +343,14 @@
   static uint64_t  _ncycles;
   static Ticks     _start_of_last;
   static Ticks     _end_of_last;
-  static NumberSeq _duration;
+  static NumberSeq _normalized_duration;
 
 public:
   static void at_start();
   static void at_end(double boost_factor);
 
   static uint64_t ncycles();
-  static const AbsSeq& duration();
+  static const AbsSeq& normalized_duration();
   static double time_since_last();
 };