diff --git a/src/hotspot/cpu/aarch64/aarch64.ad b/src/hotspot/cpu/aarch64/aarch64.ad
index a5943a13d61..171ce00ae56 100644
--- a/src/hotspot/cpu/aarch64/aarch64.ad
+++ b/src/hotspot/cpu/aarch64/aarch64.ad
@@ -16019,33 +16019,33 @@ instruct cmpFastUnlock(rFlagsReg cr, iRegP object, iRegP box, iRegPNoSp tmp, iRe
   ins_pipe(pipe_serial);
 %}
 
-instruct cmpFastLockLightweight(rFlagsReg cr, iRegP object, iRegP box, iRegPNoSp tmp, iRegPNoSp tmp2)
+instruct cmpFastLockLightweight(rFlagsReg cr, iRegP object, iRegP box, iRegPNoSp tmp, iRegPNoSp tmp2, iRegPNoSp tmp3)
 %{
   predicate(LockingMode == LM_LIGHTWEIGHT);
   match(Set cr (FastLock object box));
-  effect(TEMP tmp, TEMP tmp2);
+  effect(TEMP tmp, TEMP tmp2, TEMP tmp3);
 
   ins_cost(5 * INSN_COST);
-  format %{ "fastlock $object,$box\t! kills $tmp,$tmp2" %}
+  format %{ "fastlock $object,$box\t! kills $tmp,$tmp2,$tmp3" %}
 
   ins_encode %{
-    __ fast_lock_lightweight($object$$Register, $box$$Register, $tmp$$Register, $tmp2$$Register);
+    __ fast_lock_lightweight($object$$Register, $tmp$$Register, $tmp2$$Register, $tmp3$$Register);
   %}
 
   ins_pipe(pipe_serial);
 %}
 
-instruct cmpFastUnlockLightweight(rFlagsReg cr, iRegP object, iRegP box, iRegPNoSp tmp, iRegPNoSp tmp2)
+instruct cmpFastUnlockLightweight(rFlagsReg cr, iRegP object, iRegP box, iRegPNoSp tmp, iRegPNoSp tmp2, iRegPNoSp tmp3)
 %{
   predicate(LockingMode == LM_LIGHTWEIGHT);
   match(Set cr (FastUnlock object box));
-  effect(TEMP tmp, TEMP tmp2);
+  effect(TEMP tmp, TEMP tmp2, TEMP tmp3);
 
   ins_cost(5 * INSN_COST);
-  format %{ "fastunlock $object,$box\t! kills $tmp, $tmp2" %}
+  format %{ "fastunlock $object,$box\t! kills $tmp, $tmp2, $tmp3" %}
 
   ins_encode %{
-    __ fast_unlock_lightweight($object$$Register, $box$$Register, $tmp$$Register, $tmp2$$Register);
+    __ fast_unlock_lightweight($object$$Register, $tmp$$Register, $tmp2$$Register, $tmp3$$Register);
   %}
 
   ins_pipe(pipe_serial);