diff --git a/lib/csharp/src/Protocol/TProtocolException.cs b/lib/csharp/src/Protocol/TProtocolException.cs
index 207f5e9..4e4393f 100644
--- a/lib/csharp/src/Protocol/TProtocolException.cs
+++ b/lib/csharp/src/Protocol/TProtocolException.cs
@@ -25,7 +25,7 @@
 
 namespace Thrift.Protocol
 {
-	class TProtocolException : Exception
+	public class TProtocolException : Exception
 	{
 		public const int UNKNOWN = 0;
 		public const int INVALID_DATA = 1;