diff --git a/lib/csharp/Makefile.am b/lib/csharp/Makefile.am
index f113e1a..be49d5e 100644
--- a/lib/csharp/Makefile.am
+++ b/lib/csharp/Makefile.am
@@ -97,14 +97,15 @@
 	$(RM) Thrift.45.dll
 
 EXTRA_DIST = \
-             $(THRIFTCODE) \
-             ThriftMSBuildTask \
-             src/Thrift.csproj \
-             src/Thrift.45.csproj \
-             src/Thrift.sln \
-             src/Transport/TSilverlightSocket.cs \
-             src/Transport/THttpTaskAsyncHandler.cs \
-             src/TAsyncProcessor.cs \
-             test \
-             coding_standards.md \
-             README.md
+	$(THRIFTCODE) \
+	ThriftMSBuildTask \
+	src/Thrift.csproj \
+	src/Thrift.45.csproj \
+	src/Thrift.sln \
+	src/Net35/ExtensionsNet35.cs \
+	src/Transport/TSilverlightSocket.cs \
+	src/Transport/THttpTaskAsyncHandler.cs \
+	src/TAsyncProcessor.cs \
+	test \
+	coding_standards.md \
+	README.md