diff --git a/Shared/Shared.projitems b/Shared/Shared.projitems
index f9651ae..04b8a59 100644
--- a/Shared/Shared.projitems
+++ b/Shared/Shared.projitems
@@ -20,6 +20,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Line.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Player.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)SneakGame.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Timer.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)World.cs" />
   </ItemGroup>
 </Project>
\ No newline at end of file