diff --git a/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj b/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
index 64b89554e8..5e03c074f4 100644
--- a/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
+++ b/BizHawk.Emulation.Cores/BizHawk.Emulation.Cores.csproj
@@ -357,7 +357,8 @@
     <Compile Include="Consoles\Atari\A7800Hawk\A7800HawkControllerDeck.cs" />
     <Compile Include="Consoles\Atari\A7800Hawk\A7800HawkControllers.cs" />
     <Compile Include="Consoles\Atari\A7800Hawk\Mappers\MapperDefault.cs" />
-		<Compile Include="Consoles\Atari\A7800Hawk\Mappers\MapperSG.cs" />
+    <Compile Include="Consoles\Atari\A7800Hawk\Mappers\MapperSG.cs" />
+    <Compile Include="Consoles\Atari\A7800Hawk\Mappers\MapperSGE.cs" />
     <Compile Include="Consoles\Atari\A7800Hawk\Mappers\MapperBase.cs" />
     <Compile Include="Consoles\Atari\A7800Hawk\MemoryMap.cs">
       <DependentUpon>A7800Hawk.cs</DependentUpon>