diff --git a/CollectionLabels.csproj b/CollectionLabels.csproj
index 36c1001..8ce5826 100644
--- a/CollectionLabels.csproj
+++ b/CollectionLabels.csproj
@@ -32,7 +32,7 @@
     <WarningLevel>4</WarningLevel>
   </PropertyGroup>
   <ItemGroup>
-    <Compile Include="CollectionLabelsMod.cs" />
+    <Compile Include="src\CollectionLabelsMod.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
   <ItemGroup>
diff --git a/CollectionLabelsMod.cs b/src/CollectionLabelsMod.cs
similarity index 100%
rename from CollectionLabelsMod.cs
rename to src/CollectionLabelsMod.cs