diff --git a/websocket-sharp/Net/HttpUtility.cs b/websocket-sharp/Net/HttpUtility.cs
index 21287ab7..8fdb46d2 100644
--- a/websocket-sharp/Net/HttpUtility.cs
+++ b/websocket-sharp/Net/HttpUtility.cs
@@ -1043,7 +1043,7 @@ namespace WebSocketSharp.Net
       if (s.Length == 0)
         return;
 
-      output.Write (htmlEncode (s));
+      output.Write (htmlEncode (s, false));
     }
 
     public static string UrlDecode (string s)