diff --git a/src/mame/drivers/cop01.c b/src/mame/drivers/cop01.c
index b6039df8592..604d71b09df 100644
--- a/src/mame/drivers/cop01.c
+++ b/src/mame/drivers/cop01.c
@@ -660,4 +660,4 @@ static DRIVER_INIT( mightguy )
 
 GAME( 1985, cop01,    0,     cop01,    cop01,    0,        ROT0,   "Nichibutsu", "Cop 01 (set 1)", GAME_SUPPORTS_SAVE )
 GAME( 1985, cop01a,   cop01, cop01,    cop01,    0,        ROT0,   "Nichibutsu", "Cop 01 (set 2)", GAME_SUPPORTS_SAVE )
-GAME( 1986, mightguy, 0,     mightguy, mightguy, mightguy, ROT270, "Nichibutsu", "Mighty Guy", GAME_NOT_WORKING | GAME_UNEMULATED_PROTECTION | GAME_IMPERFECT_SOUND | GAME_SUPPORTS_SAVE )
+GAME( 1986, mightguy, 0,     mightguy, mightguy, mightguy, ROT270, "Nichibutsu", "Mighty Guy", GAME_NOT_WORKING | GAME_UNEMULATED_PROTECTION | GAME_NO_SOUND | GAME_SUPPORTS_SAVE )