-/* 005 */ (Function) NULL, /* deprecated */
-/* 006 */ (Function) NULL, /* deprecated */
+#ifdef ENABLE_MUTEX_DEBUG
+/* 005 */ (Function) xmutex,
+/* 006 */ (Function) mutex_debug,
+#else
+/* 005 */ (Function) NULL,
+/* 006 */ (Function) NULL,
+#endif