diff --git a/src/mame/drivers/zn.c b/src/mame/drivers/zn.c
index 91e5660c58f..ca9c5d56c0f 100644
--- a/src/mame/drivers/zn.c
+++ b/src/mame/drivers/zn.c
@@ -2769,6 +2769,7 @@ ROM_START( cpzn1 )
 	ROM_REGION32_LE( 0x80000, "countryrom", ROMREGION_ERASE00 )
 	ROM_REGION32_LE( 0x2400000, "maskroms", ROMREGION_ERASE00 )
 	ROM_REGION( 0x50000, "audiocpu", ROMREGION_ERASE00 )
+	ROM_REGION( 0x400000, "qsound", ROMREGION_ERASE00 )
 ROM_END
 
 /* 95681-2 */
@@ -3141,6 +3142,7 @@ ROM_START( cpzn2 )
 	ROM_REGION32_LE( 0x80000, "countryrom", ROMREGION_ERASE00 )
 	ROM_REGION32_LE( 0x3000000, "maskroms", ROMREGION_ERASE00 )
 	ROM_REGION( 0x50000, "audiocpu", ROMREGION_ERASE00 )
+	ROM_REGION( 0x400000, "qsound", ROMREGION_ERASE00 )
 ROM_END
 
 /* 95681-2 */