diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/NES.IMemoryDomains.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/NES.IMemoryDomains.cs
index 0997f6e269..30d37f6e20 100644
--- a/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/NES.IMemoryDomains.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/NES/NES.IMemoryDomains.cs
@@ -8,7 +8,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.NES
 {
 	public partial class NES
 	{
-		private MemoryDomainList _memoryDomains;
+		public MemoryDomainList _memoryDomains;
 		private bool _memoryDomainsSetup = false;
 
 		private void SetupMemoryDomains()
diff --git a/BizHawk.Emulation.Cores/Consoles/Nintendo/SubNESHawk/SubNESHawk.cs b/BizHawk.Emulation.Cores/Consoles/Nintendo/SubNESHawk/SubNESHawk.cs
index d74af9ed40..bc20055601 100644
--- a/BizHawk.Emulation.Cores/Consoles/Nintendo/SubNESHawk/SubNESHawk.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Nintendo/SubNESHawk/SubNESHawk.cs
@@ -41,7 +41,7 @@ namespace BizHawk.Emulation.Cores.Nintendo.SubNESHawk
 
 			ServiceProvider = ser;
 
-			SetupMemoryDomains();
+			(ServiceProvider as BasicServiceProvider).Register<IMemoryDomains>(subnes._memoryDomains);
 
 			subnes.using_reset_timing = true;
 			HardReset();