diff --git a/src/mame/drivers/blockade.c b/src/mame/drivers/blockade.c
index 9f1b57f3685..b931f482f37 100644
--- a/src/mame/drivers/blockade.c
+++ b/src/mame/drivers/blockade.c
@@ -562,9 +562,9 @@ ROM_START( mineswpr4 )
     ROM_LOAD_NIB_LOW(  "mineswee.cls", 0x0000, 0x0200, CRC(70959755) SHA1(f62d448742da3fae8bbd96eb3a2714db500cecce) )
 ROM_END
 
-GAME( 1976, blockade, 0, blockade, blockade, blockade, ROT0, "Gremlin", "Blockade", GAME_IMPERFECT_SOUND )
-GAME( 1976, comotion, 0, comotion, comotion, blockade, ROT0, "Gremlin", "Comotion", GAME_IMPERFECT_SOUND )
-GAME( 1978, blasto,   0, blasto,   blasto,   blockade, ROT0, "Gremlin", "Blasto", GAME_IMPERFECT_SOUND )
-GAME( 1977, hustle,   0, hustle,   hustle,   blockade, ROT0, "Gremlin", "Hustle", GAME_IMPERFECT_SOUND )
-GAME( 1977, mineswpr, 0, blasto,   mineswpr, blockade, ROT0, "Amutech", "Minesweeper", GAME_IMPERFECT_SOUND )
-GAME( 1977, mineswpr4,0, blasto,   minesw4p, blockade, ROT0, "Amutech", "Minesweeper (4-Player)", GAME_IMPERFECT_SOUND )
+GAME( 1976, blockade,  0,        blockade, blockade, blockade, ROT0, "Gremlin", "Blockade", GAME_IMPERFECT_SOUND )
+GAME( 1976, comotion,  0,        comotion, comotion, blockade, ROT0, "Gremlin", "Comotion", GAME_IMPERFECT_SOUND )
+GAME( 1978, blasto,    0,        blasto,   blasto,   blockade, ROT0, "Gremlin", "Blasto", GAME_IMPERFECT_SOUND )
+GAME( 1977, hustle,    0,        hustle,   hustle,   blockade, ROT0, "Gremlin", "Hustle", GAME_IMPERFECT_SOUND )
+GAME( 1977, mineswpr,  0,        blasto,   mineswpr, blockade, ROT0, "Amutech", "Minesweeper", GAME_IMPERFECT_SOUND )
+GAME( 1977, mineswpr4, mineswpr, blasto,   minesw4p, blockade, ROT0, "Amutech", "Minesweeper (4-Player)", GAME_IMPERFECT_SOUND )