--- xnu/xnu-792.10.96/iokit/Kernel/IOStartIOKit.cpp
+++ xnu/xnu-792.25.20/iokit/Kernel/IOStartIOKit.cpp
@@ -37,6 +37,7 @@
 #include <IOKit/IOLib.h>
 #include <IOKit/IOKitKeys.h>
 #include <IOKit/IOKitDebug.h>
+#include <IOKit/pwr_mgt/IOPMinformeeList.h>
 
 #include <IOKit/assert.h>
 
@@ -152,6 +153,9 @@
     IOUserClient::initialize();
     IOMemoryDescriptor::initialize();
 
+    // Initializes IOPMinformeeList class-wide shared lock
+    IOPMinformeeList::getSharedRecursiveLock();
+
     obj = OSString::withCString( version );
     assert( obj );
     if( obj ) {