diff -r 43c4fb8ba96b -r a1eba2e37671 src/hotspot/share/gc/g1/heapRegionRemSet.cpp
--- a/src/hotspot/share/gc/g1/heapRegionRemSet.cpp	Tue Jul 16 08:56:08 2019 +0200
+++ b/src/hotspot/share/gc/g1/heapRegionRemSet.cpp	Fri Sep 27 07:56:02 2019 -0400
@@ -428,7 +428,7 @@
                                    HeapRegion* hr)
   : _bot(bot),
     _code_roots(),
-    _m(Mutex::leaf, FormatBuffer<128>("HeapRegionRemSet lock #%u", hr->hrm_index()), true, Monitor::_safepoint_check_never),
+    _m(Mutex::leaf, FormatBuffer<128>("HeapRegionRemSet lock #%u", hr->hrm_index()), true, Mutex::_safepoint_check_never),
     _other_regions(&_m),
     _hr(hr),
     _state(Untracked)