diff --git a/websocket-sharp/WebSocket.cs b/websocket-sharp/WebSocket.cs
index b147ca2b..97397be0 100644
--- a/websocket-sharp/WebSocket.cs
+++ b/websocket-sharp/WebSocket.cs
@@ -3744,13 +3744,13 @@ namespace WebSocketSharp
     ///   <see langword="null"/> if not necessary.
     ///   </para>
     /// </param>
+    /// <exception cref="ArgumentNullException">
+    /// <paramref name="data"/> is <see langword="null"/>.
+    /// </exception>
     /// <exception cref="InvalidOperationException">
     /// The SendAsync method is not available when the current state of
     /// the interface is not Open.
     /// </exception>
-    /// <exception cref="ArgumentNullException">
-    /// <paramref name="data"/> is <see langword="null"/>.
-    /// </exception>
     public void SendAsync (byte[] data, Action<bool> completed)
     {
       if (_readyState != WebSocketState.Open) {