diff -r c203d10291e1 -r 8b16701b4636 src/hotspot/share/gc/z/zStat.hpp
--- a/src/hotspot/share/gc/z/zStat.hpp	Mon Oct 21 09:55:48 2019 +0200
+++ b/src/hotspot/share/gc/z/zStat.hpp	Mon Oct 21 09:55:58 2019 +0200
@@ -315,8 +315,8 @@
 //
 // Stat sample/increment
 //
-void ZStatSample(const ZStatSampler& sampler, uint64_t value, bool trace = ZStatisticsForceTrace);
-void ZStatInc(const ZStatCounter& counter, uint64_t increment = 1, bool trace = ZStatisticsForceTrace);
+void ZStatSample(const ZStatSampler& sampler, uint64_t value);
+void ZStatInc(const ZStatCounter& counter, uint64_t increment = 1);
 void ZStatInc(const ZStatUnsampledCounter& counter, uint64_t increment = 1);
 
 //