diff --git a/lib/csharp/src/Thrift.WP7.csproj b/lib/csharp/src/Thrift.WP7.csproj
index 2b2147e..d35adf4 100644
--- a/lib/csharp/src/Thrift.WP7.csproj
+++ b/lib/csharp/src/Thrift.WP7.csproj
@@ -31,7 +31,7 @@
     <AssemblyName>Thrift.WP7</AssemblyName>
     <TargetFrameworkVersion>v4.0</TargetFrameworkVersion>
     <SilverlightVersion>$(TargetFrameworkVersion)</SilverlightVersion>
-    <TargetFrameworkProfile>WindowsPhone</TargetFrameworkProfile>
+    <TargetFrameworkProfile>WindowsPhone71</TargetFrameworkProfile>
     <TargetFrameworkIdentifier>Silverlight</TargetFrameworkIdentifier>
     <SilverlightApplication>false</SilverlightApplication>
     <ValidateXaml>true</ValidateXaml>
@@ -98,6 +98,7 @@
     <Compile Include="TProcessor.cs" />
     <Compile Include="Transport\TFramedTransport.cs" />
     <Compile Include="Transport\THttpClient.cs" />
+    <Compile Include="Transport\TSilverlightSocket.cs" />
     <Compile Include="Transport\TStreamTransport.cs" />
     <Compile Include="Transport\TTransport.cs" />
     <Compile Include="Transport\TTransportException.cs" />