diff --git a/cis237assignment3/cis237assignment3.csproj b/cis237assignment3/cis237assignment3.csproj
index d46b160519eade52e720c177b97b38abdc617673..5d54e105b8c901eefed376336fd04eb44f7ee2f5 100644
--- a/cis237assignment3/cis237assignment3.csproj
+++ b/cis237assignment3/cis237assignment3.csproj
@@ -41,6 +41,7 @@
     <Reference Include="System.Xml" />
   </ItemGroup>
   <ItemGroup>
+    <Compile Include="IDroid.cs" />
     <Compile Include="Program.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>