diff --git a/OpenRa.TechTreeTest/OpenRa.TechTreeTest.csproj b/OpenRa.TechTreeTest/OpenRa.TechTreeTest.csproj
index 4a474598e2..d6c63f1a6a 100644
--- a/OpenRa.TechTreeTest/OpenRa.TechTreeTest.csproj
+++ b/OpenRa.TechTreeTest/OpenRa.TechTreeTest.csproj
@@ -4,7 +4,7 @@
     <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
     <ProductVersion>8.0.50727</ProductVersion>
     <SchemaVersion>2.0</SchemaVersion>
-    <ProjectGuid>0a435def-c144-460f-bc7c-668a73a29b4c</ProjectGuid>
+    <ProjectGuid>{C0DA4050-CF36-494B-AEB8-BFFC3F65B2AA}</ProjectGuid>
     <OutputType>WinExe</OutputType>
     <AppDesignerFolder>Properties</AppDesignerFolder>
     <RootNamespace>OpenRa.TechTreeTest</RootNamespace>
@@ -62,6 +62,13 @@
       <DependentUpon>Settings.settings</DependentUpon>
       <DesignTimeSharedInput>True</DesignTimeSharedInput>
     </Compile>
+    <Compile Include="TechTree.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\OpenRa.FileFormats\OpenRa.FileFormats.csproj">
+      <Project>{BDAEAB25-991E-46A7-AF1E-4F0E03358DAA}</Project>
+      <Name>OpenRa.FileFormats</Name>
+    </ProjectReference>
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <!-- To modify your build process, add your task inside one of the targets below and uncomment it. 
diff --git a/OpenRa.sln b/OpenRa.sln
index 2022fe774c..2bc17287a1 100644
--- a/OpenRa.sln
+++ b/OpenRa.sln
@@ -13,6 +13,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "OpenRa.Game", "OpenRa.Game\
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TileSheetTest", "TileSheetTest\TileSheetTest.csproj", "{8A2FF5A6-D2CC-4CC4-844A-A1E7D3F69D0B}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "OpenRa.TechTreeTest", "OpenRa.TechTreeTest\OpenRa.TechTreeTest.csproj", "{C0DA4050-CF36-494B-AEB8-BFFC3F65B2AA}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -83,6 +85,16 @@ Global
 		{8A2FF5A6-D2CC-4CC4-844A-A1E7D3F69D0B}.Release|Mixed Platforms.ActiveCfg = Release|Any CPU
 		{8A2FF5A6-D2CC-4CC4-844A-A1E7D3F69D0B}.Release|Mixed Platforms.Build.0 = Release|Any CPU
 		{8A2FF5A6-D2CC-4CC4-844A-A1E7D3F69D0B}.Release|Win32.ActiveCfg = Release|Any CPU
+		{C0DA4050-CF36-494B-AEB8-BFFC3F65B2AA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{C0DA4050-CF36-494B-AEB8-BFFC3F65B2AA}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{C0DA4050-CF36-494B-AEB8-BFFC3F65B2AA}.Debug|Mixed Platforms.ActiveCfg = Debug|Any CPU
+		{C0DA4050-CF36-494B-AEB8-BFFC3F65B2AA}.Debug|Mixed Platforms.Build.0 = Debug|Any CPU
+		{C0DA4050-CF36-494B-AEB8-BFFC3F65B2AA}.Debug|Win32.ActiveCfg = Debug|Any CPU
+		{C0DA4050-CF36-494B-AEB8-BFFC3F65B2AA}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{C0DA4050-CF36-494B-AEB8-BFFC3F65B2AA}.Release|Any CPU.Build.0 = Release|Any CPU
+		{C0DA4050-CF36-494B-AEB8-BFFC3F65B2AA}.Release|Mixed Platforms.ActiveCfg = Release|Any CPU
+		{C0DA4050-CF36-494B-AEB8-BFFC3F65B2AA}.Release|Mixed Platforms.Build.0 = Release|Any CPU
+		{C0DA4050-CF36-494B-AEB8-BFFC3F65B2AA}.Release|Win32.ActiveCfg = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE