--- xnu/xnu-344.21.73/iokit/Kernel/IOKitDebug.cpp
+++ xnu/xnu-517/iokit/Kernel/IOKitDebug.cpp
@@ -206,7 +206,7 @@
     updateOffset( dict, debug_container_malloc_size, "Container allocation" );
     updateOffset( dict, debug_iomalloc_size, "IOMalloc allocation" );
 
-    dict->setObject( "Classes", OSMetaClass::getClassDictionary() );
+    OSMetaClass::serializeClassDictionary(dict);
 
     ok = dict->serialize( s );