diff --git a/Step.Model/Step.Model.csproj b/Step.Model/Step.Model.csproj
index 1512a2d1..716e254b 100644
--- a/Step.Model/Step.Model.csproj
+++ b/Step.Model/Step.Model.csproj
@@ -100,6 +100,7 @@
     <Compile Include="DTOModels\DTOUserSoftKeyModel.cs" />
     <Compile Include="DTOModels\DTOStartupConfigurationModel.cs" />
     <Compile Include="DTOModels\DTOUserModel.cs" />
+    <Compile Include="DTOModels\ToolModels\DTOSiemensToolModel.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="DatabaseModels\UserModel.cs">
       <Generator>DtsGenerator</Generator>