--- xnu/xnu-344/libkern/c++/OSUnserialize.cpp
+++ xnu/xnu-792.25.20/libkern/c++/OSUnserialize.cpp
@@ -1565,7 +1565,7 @@
 	OSObject *object;
 
 	if (!lock) {
-		lock = mutex_alloc(ETAP_IO_AHA);
+		lock = mutex_alloc(0);
 		mutex_lock(lock);
 	} else {
 		mutex_lock(lock);