diff --git a/src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/MMC3_family/TxROM.cs b/src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/MMC3_family/TxROM.cs
index 9af000e9a6..39c65df7c2 100644
--- a/src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/MMC3_family/TxROM.cs
+++ b/src/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/Boards/MMC3_family/TxROM.cs
@@ -34,6 +34,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
 				case "TXROM-HOMEBREW": // should this even exist?
 					break;
 				case "MAPPER004":
+				case "MAPPER0004-00":
 					if (Cart.InesMirroring == 2) // send these to TVROM
 						return false;
 					break;