diff --git a/BizHawk.Emulation.Common/Interfaces/Services/IMemoryDomains.cs b/BizHawk.Emulation.Common/Interfaces/Services/IMemoryDomains.cs
index a8cc3e8fd0..a34b992621 100644
--- a/BizHawk.Emulation.Common/Interfaces/Services/IMemoryDomains.cs
+++ b/BizHawk.Emulation.Common/Interfaces/Services/IMemoryDomains.cs
@@ -17,11 +17,11 @@ namespace BizHawk.Emulation.Common
 	{
 		MemoryDomain this[string name] { get; }
 
-		MemoryDomain MainMemory { get; set; }
+		MemoryDomain MainMemory { get; }
 
 		bool HasSystemBus { get; }
 
-		MemoryDomain SystemBus { get; set; }
+		MemoryDomain SystemBus { get; }
 
 		bool Has(string name);
 	}