diff --git a/BizHawk.Emulation.Cores/Consoles/Sega/SMS/SMS.cs b/BizHawk.Emulation.Cores/Consoles/Sega/SMS/SMS.cs
index 423b11b965..76fe7b8474 100644
--- a/BizHawk.Emulation.Cores/Consoles/Sega/SMS/SMS.cs
+++ b/BizHawk.Emulation.Cores/Consoles/Sega/SMS/SMS.cs
@@ -79,6 +79,7 @@ namespace BizHawk.Emulation.Cores.Sega.MasterSystem
 			{
 				ReadHardware = ReadPort,
 				WriteHardware = WritePort,
+				FetchMemory = ReadMemory,
 				ReadMemory = ReadMemory,
 				WriteMemory = WriteMemory,
 				MemoryCallbacks = MemoryCallbacks
@@ -262,7 +263,7 @@ namespace BizHawk.Emulation.Cores.Sega.MasterSystem
 		/// <summary>
 		/// A dummy FetchMemory that simply reads the memory
 		/// </summary>
-		private byte FetchMemory_StubThunk(ushort address, bool first)
+		private byte FetchMemory_StubThunk(ushort address)
 		{
 			return ReadMemory(address);
 		}
@@ -355,4 +356,4 @@ namespace BizHawk.Emulation.Cores.Sega.MasterSystem
 		
 		private readonly string[] validRegions = { "Export", "Japan", "Auto" };
 	}
-}
\ No newline at end of file
+}