--- old/src/hotspot/cpu/x86/macroAssembler_x86.hpp	2019-12-11 14:52:02.000000000 -0500
+++ new/src/hotspot/cpu/x86/macroAssembler_x86.hpp	2019-12-11 14:52:01.000000000 -0500
@@ -682,6 +682,7 @@
                            BiasedLockingCounters* counters = NULL);
   void biased_locking_exit (Register obj_reg, Register temp_reg, Label& done);
 #ifdef COMPILER2
+  void inc_om_ref_count(Register obj_reg, Register om_reg, Register temp_reg, Label& done);
   // Code used by cmpFastLock and cmpFastUnlock mach instructions in .ad file.
   // See full desription in macroAssembler_x86.cpp.
   void fast_lock(Register obj, Register box, Register tmp,