diff --git a/websocket-sharp/Net/ResponseStream.cs b/websocket-sharp/Net/ResponseStream.cs
index 11a38522..598054f1 100644
--- a/websocket-sharp/Net/ResponseStream.cs
+++ b/websocket-sharp/Net/ResponseStream.cs
@@ -48,7 +48,7 @@ namespace WebSocketSharp.Net
     #region Private Fields
 
     private MemoryStream             _body;
-    private static readonly byte[]   _crlf = new byte[] { 13, 10 };
+    private static readonly byte[]   _crlf;
     private bool                     _disposed;
     private HttpListenerResponse     _response;
     private bool                     _sendChunked;
@@ -59,6 +59,15 @@ namespace WebSocketSharp.Net
 
     #endregion
 
+    #region Static Constructor
+
+    static ResponseStream ()
+    {
+      _crlf = new byte[] { 13, 10 };
+    }
+
+    #endregion
+
     #region Internal Constructors
 
     internal ResponseStream (