diff --git a/src/BizHawk.Client.DiscoHawk/BizHawk.Client.DiscoHawk.csproj b/src/BizHawk.Client.DiscoHawk/BizHawk.Client.DiscoHawk.csproj
index f8bc0f85b6..60ba414b0a 100755
--- a/src/BizHawk.Client.DiscoHawk/BizHawk.Client.DiscoHawk.csproj
+++ b/src/BizHawk.Client.DiscoHawk/BizHawk.Client.DiscoHawk.csproj
@@ -5,13 +5,11 @@
 	<Import Project="../MainSlnExecutable.props" />
 	<PropertyGroup>
 		<ApplicationIcon>discohawk.ico</ApplicationIcon>
-		<DefineConstants>$(DefineConstants);EXE_PROJECT</DefineConstants>
 		<Nullable>disable</Nullable>
 	</PropertyGroup>
 	<ItemGroup>
 		<Reference Include="System.Windows.Forms" />
 		<ProjectReference Include="$(ProjectDir)../BizHawk.Emulation.DiscSystem/BizHawk.Emulation.DiscSystem.csproj" />
-		<Compile Include="$(ProjectDir)../BizHawk.Common/OSTailoredCode.cs" />
 		<Content Include="discohawk.ico" />
 		<EmbeddedResource Include="discohawk.ico" />
 	</ItemGroup>
diff --git a/src/BizHawk.Client.EmuHawk/BizHawk.Client.EmuHawk.csproj b/src/BizHawk.Client.EmuHawk/BizHawk.Client.EmuHawk.csproj
index 313b4ad098..0ab7a768c5 100755
--- a/src/BizHawk.Client.EmuHawk/BizHawk.Client.EmuHawk.csproj
+++ b/src/BizHawk.Client.EmuHawk/BizHawk.Client.EmuHawk.csproj
@@ -7,7 +7,6 @@
 		<AllowUnsafeBlocks>true</AllowUnsafeBlocks>
 		<ApplicationIcon>images/logo.ico</ApplicationIcon>
 		<ApplicationManifest>app.manifest</ApplicationManifest>
-		<DefineConstants>$(DefineConstants);EXE_PROJECT</DefineConstants>
 		<Nullable>disable</Nullable>
 		<ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch>None</ResolveAssemblyWarnOrErrorOnTargetArchitectureMismatch>
 	</PropertyGroup>
@@ -24,7 +23,6 @@
 	<ItemGroup>
 		<ProjectReference Include="$(ProjectDir)../BizHawk.Bizware.DirectX/BizHawk.Bizware.DirectX.csproj" />
 		<ProjectReference Include="$(ProjectDir)../BizHawk.WinForms.Controls/BizHawk.WinForms.Controls.csproj" />
-		<Compile Include="$(ProjectDir)../BizHawk.Common/OSTailoredCode.cs" />
 		<Compile Remove="Properties/Settings.Designer.cs" />
 		<Content Include="images/logo.ico" />
 		<EmbeddedResource Include="images/**/*" />
diff --git a/src/MainSlnExecutable.props b/src/MainSlnExecutable.props
index 92a921166d..9e2c00a3ec 100644
--- a/src/MainSlnExecutable.props
+++ b/src/MainSlnExecutable.props
@@ -1,6 +1,7 @@
 <Project>
 	<Import Project="MainSlnCommon.props" />
 	<PropertyGroup>
+		<DefineConstants>$(DefineConstants);EXE_PROJECT</DefineConstants>
 		<OutputPath>$(ProjectDir)../../output</OutputPath>
 		<TargetName>$(MSBuildProjectName.Substring($([MSBuild]::Add($(MSBuildProjectName.LastIndexOf('.')), 1))))</TargetName>
 	</PropertyGroup>
@@ -10,6 +11,9 @@
 	<PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
 		<OutputType>WinExe</OutputType>
 	</PropertyGroup>
+	<ItemGroup>
+		<Compile Include="$(ProjectDir)../BizHawk.Common/OSTailoredCode.cs" />
+	</ItemGroup>
 	<Target Name="PostBuild" AfterTargets="PostBuildEvent">
 		<ItemGroup>
 			<NotExecFilesFromExecProj Include="$(OutputPath)*.deps.json" />