diff --git a/src/BizHawk.Client.EmuHawk/tools/HexEditor/HexEditor.cs b/src/BizHawk.Client.EmuHawk/tools/HexEditor/HexEditor.cs
index fbbef79df9..a914dc3437 100644
--- a/src/BizHawk.Client.EmuHawk/tools/HexEditor/HexEditor.cs
+++ b/src/BizHawk.Client.EmuHawk/tools/HexEditor/HexEditor.cs
@@ -205,7 +205,7 @@ namespace BizHawk.Client.EmuHawk
 
 		public override void Restart()
 		{
-			if (!(MainForm.CurrentlyOpenRomArgs.OpenAdvanced is OpenAdvanced_MAME))
+			if (Emulator.SystemId is not VSystemID.Raw.Arcade)
 			{
 				_rom = GetRomBytes();
 				_romDomain = new MemoryDomainByteArray(ROM_DOMAIN_NAME, MemoryDomain.Endian.Little, _rom, writable: true, wordSize: 1);