--- libmalloc/libmalloc-792.41.1/src/trace.h
+++ libmalloc/libmalloc-715.140.5/src/trace.h
@@ -87,6 +87,5 @@
 TRACE_CODE(xzone_thread_detach, DBG_UMALLOC_INTERNAL, 0xb00);
 TRACE_CODE(xzone_thread_cache_malloc, DBG_UMALLOC_INTERNAL, 0xc00);
 TRACE_CODE(xzone_thread_cache_free, DBG_UMALLOC_INTERNAL, 0xd00);
-TRACE_CODE(xzone_list_upgrade, DBG_UMALLOC_INTERNAL, 0xe00);
 
 #endif // __TRACE_H