diff --git a/lib/csharp/src/Protocol/TProtocolException.cs b/lib/csharp/src/Protocol/TProtocolException.cs
index b81db1a..41c26a3 100644
--- a/lib/csharp/src/Protocol/TProtocolException.cs
+++ b/lib/csharp/src/Protocol/TProtocolException.cs
@@ -43,7 +43,7 @@
         }
 
         public TProtocolException(int type, Exception inner = null)
-            : base(inner)
+            : base(string.Empty,inner)
         {
             type_ = type;
         }