diff --git a/websocket-sharp/Net/Cookie.cs b/websocket-sharp/Net/Cookie.cs
index 8fe6df60..245ec1c0 100644
--- a/websocket-sharp/Net/Cookie.cs
+++ b/websocket-sharp/Net/Cookie.cs
@@ -382,7 +382,7 @@ namespace WebSocketSharp.Net
     ///   the comment to document intended use of the cookie.
     ///   </para>
     ///   <para>
-    ///   <see langword="null"/> if the cookie has no CommentURL attribute.
+    ///   <see langword="null"/> if not present.
     ///   </para>
     ///   <para>
     ///   The default value is <see langword="null"/>.