diff --git a/src/mame/drivers/metlfrzr.cpp b/src/mame/drivers/metlfrzr.cpp
index b343fd7af4e..414a0970f76 100644
--- a/src/mame/drivers/metlfrzr.cpp
+++ b/src/mame/drivers/metlfrzr.cpp
@@ -1,9 +1,11 @@
 // license:BSD-3-Clause
-// copyright-holders:David Haywood, Angelo Salese
+// copyright-holders:Angelo Salese
 /****************************************
 
 	Metal Freezer (c) 1989 Seibu
 	
+	preliminary driver by Angelo Salese
+	
 	HW seems the natural evolution of Dark Mist type HW.
 	
 	TODO:
@@ -16,6 +18,7 @@
 
 #include "emu.h"
 #include "cpu/z80/z80.h"
+
 #include "audio/t5182.h"
 
 class metlfrzr_state : public driver_device