diff --git a/src/mame/drivers/zn.cpp b/src/mame/drivers/zn.cpp
index 79d6ea77855..c4de6dc757f 100644
--- a/src/mame/drivers/zn.cpp
+++ b/src/mame/drivers/zn.cpp
@@ -4079,6 +4079,7 @@ ROM_START( taitofx1 )
 	TAITOFX1_BIOS
 	ROM_REGION32_LE( 0x01000000, "bankedroms", ROMREGION_ERASE00 )
 	ROM_REGION( 0x080000, "audiocpu", ROMREGION_ERASE00 )
+	ROM_REGION( 0x200000, "ymsnd", ROMREGION_ERASE00 )
 ROM_END
 
 ROM_START( ftimpcta )