diff --git a/src/mame/drivers/williams.c b/src/mame/drivers/williams.c
index 483ee577a47..d71db50a1dd 100644
--- a/src/mame/drivers/williams.c
+++ b/src/mame/drivers/williams.c
@@ -1644,7 +1644,7 @@ ROM_START( defendg )
 	ROM_LOAD( "decoder.1",   0x0000, 0x0200, CRC(8dd98da5) SHA1(da979604f7a2aa8b5a6d4a5debd2e80f77569e35) )
 ROM_END
 
-ROM_START( defendw )
+ROM_START( defendb )
 	ROM_REGION( 0x19000, "main", 0 )
 	ROM_LOAD( "wb01.bin",     0x0d000, 0x1000, CRC(0ee1019d) SHA1(a76247e825b8267abfd195c12f96348fe10d4cbc) )
 	ROM_LOAD( "defeng02.bin", 0x0e000, 0x1000, CRC(d184ab6b) SHA1(ed61a95b04f6162aedba8a72bc46005b77283955) )
@@ -2783,7 +2783,7 @@ static DRIVER_INIT( joust2 )
 /* Defender hardware games */
 GAME( 1980, defender, 0,        defender,            defender, defender, ROT0,   "Williams", "Defender (Red label)", GAME_SUPPORTS_SAVE )
 GAME( 1980, defendg,  defender, defender,            defender, defender, ROT0,   "Williams", "Defender (Green label)", GAME_SUPPORTS_SAVE )
-GAME( 1980, defendw,  defender, defender,            defender, defender, ROT0,   "Williams", "Defender (White label)", GAME_SUPPORTS_SAVE )
+GAME( 1980, defendb,  defender, defender,            defender, defender, ROT0,   "Williams", "Defender (Blue label)", GAME_SUPPORTS_SAVE )
 GAME( 1980, defndjeu, defender, defender,            defender, defndjeu, ROT0,   "Jeutel", "Defender (bootleg)", GAME_NOT_WORKING | GAME_SUPPORTS_SAVE )
 GAME( 1980, tornado1, defender, defender,            defender, defndjeu, ROT0,   "Jeutel", "Tornado (bootleg set 1)", GAME_SUPPORTS_SAVE )
 GAME( 1980, tornado2, defender, defender,            defender, defndjeu, ROT0,   "Jeutel", "Tornado (bootleg set 2)", GAME_NOT_WORKING | GAME_SUPPORTS_SAVE ) // bad dump?
diff --git a/src/mame/mamedriv.c b/src/mame/mamedriv.c
index 01d713b70c2..ed436f8e8a2 100644
--- a/src/mame/mamedriv.c
+++ b/src/mame/mamedriv.c
@@ -2238,7 +2238,7 @@ V-V                           TP-027
 	/* Williams games */
 	DRIVER( defender )	/* (c) 1980 */
 	DRIVER( defendg )	/* (c) 1980 */
-	DRIVER( defendw )	/* (c) 1980 */
+	DRIVER( defendb )	/* (c) 1980 */
 	DRIVER( defndjeu )	/* bootleg */
 	DRIVER( tornado1 )	/* bootleg */
 	DRIVER( tornado2 )	/* bootleg */