--- xnu/xnu-517.7.21/iokit/Kernel/IOTimerEventSource.cpp
+++ xnu/xnu-201.19/iokit/Kernel/IOTimerEventSource.cpp
@@ -103,7 +103,7 @@
     IOTimerEventSource *me = new IOTimerEventSource;
 
     if (me && !me->init(inOwner, inAction)) {
-        me->release();
+        me->free();
         return 0;
     }