--- a/src/hotspot/share/runtime/mutexLocker.cpp	Sat Dec 08 17:41:17 2018 +0100
+++ b/src/hotspot/share/runtime/mutexLocker.cpp	Sat Dec 08 18:52:57 2018 -0500
@@ -199,7 +199,7 @@
 
 // Using Padded subclasses to prevent false sharing of these global monitors and mutexes.
 void mutex_init() {
-  def(tty_lock                     , PaddedMutex  , event,       true,  Monitor::_safepoint_check_never);      // allow to lock in VM
+  def(tty_lock                     , PaddedMutex  , tty,         true,  Monitor::_safepoint_check_never);      // allow to lock in VM
 
   def(CGC_lock                     , PaddedMonitor, special,     true,  Monitor::_safepoint_check_never);      // coordinate between fore- and background GC
   def(STS_lock                     , PaddedMonitor, leaf,        true,  Monitor::_safepoint_check_never);