diff --git a/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj b/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
index 537435d739..f8cad71c73 100644
--- a/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
+++ b/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
@@ -258,6 +258,14 @@
     <Compile Include="Computers\Commodore64\User\UserPortDevice.cs" />
     <Compile Include="Computers\SinclairSpectrum\Hardware\AY38912.cs" />
     <Compile Include="Computers\SinclairSpectrum\Hardware\Buzzer.cs" />
+    <Compile Include="Computers\SinclairSpectrum\Hardware\CassetteDevice\CassetteDevice.cs" />
+    <Compile Include="Computers\SinclairSpectrum\Hardware\CassetteDevice\Datacorder.cs" />
+    <Compile Include="Computers\SinclairSpectrum\Hardware\CassetteDevice\MicPulseType.cs" />
+    <Compile Include="Computers\SinclairSpectrum\Hardware\CassetteDevice\PlayPhase.cs" />
+    <Compile Include="Computers\SinclairSpectrum\Hardware\CassetteDevice\SavePhase.cs" />
+    <Compile Include="Computers\SinclairSpectrum\Hardware\CassetteDevice\SpectrumTapeHeader.cs" />
+    <Compile Include="Computers\SinclairSpectrum\Hardware\CassetteDevice\TapeFormat.cs" />
+    <Compile Include="Computers\SinclairSpectrum\Hardware\CassetteDevice\TapeOperationMode.cs" />
     <Compile Include="Computers\SinclairSpectrum\Hardware\DefaultTapeProvider.cs" />
     <Compile Include="Computers\SinclairSpectrum\Hardware\Interfaces\IKeyboard.cs" />
     <Compile Include="Computers\SinclairSpectrum\Hardware\Interfaces\ISaveToTapeProvider.cs" />
diff --git a/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/ZXSpectrum.ISettable.cs b/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/ZXSpectrum.ISettable.cs
index 6266d7e021..df56bd1b5b 100644
--- a/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/ZXSpectrum.ISettable.cs
+++ b/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/ZXSpectrum.ISettable.cs
@@ -136,8 +136,8 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
         public enum TapeLoadSpeed
         {
             Accurate,
-            Fast,
-            Fastest
+            //Fast,
+            //Fastest
         }
     }
 }
diff --git a/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/ZXSpectrum.IStatable.cs b/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/ZXSpectrum.IStatable.cs
index a9c407ca14..372cb8ed54 100644
--- a/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/ZXSpectrum.IStatable.cs
+++ b/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/ZXSpectrum.IStatable.cs
@@ -53,7 +53,7 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
             _cpu.SyncState(ser);
 
             ser.BeginSection("ZXSpectrum");
-            _cpu.SyncState(ser);
+            //_cpu.SyncState(ser);
             _machine.SyncState(ser);
             ser.Sync("Frame", ref _machine.FrameCount);
             ser.Sync("LagCount", ref _lagCount);