diff --git a/websocket-sharp/WebSocket.cs b/websocket-sharp/WebSocket.cs
index a8363493..ac699ed8 100644
--- a/websocket-sharp/WebSocket.cs
+++ b/websocket-sharp/WebSocket.cs
@@ -2662,12 +2662,12 @@ namespace WebSocketSharp
     /// <param name="data">
     /// An array of <see cref="byte"/> that represents the binary data to send.
     /// </param>
-    /// <exception cref="ArgumentNullException">
-    /// <paramref name="data"/> is <see langword="null"/>.
-    /// </exception>
     /// <exception cref="InvalidOperationException">
     /// The current state of the connection is not Open.
     /// </exception>
+    /// <exception cref="ArgumentNullException">
+    /// <paramref name="data"/> is <see langword="null"/>.
+    /// </exception>
     public void Send (byte[] data)
     {
       if (_readyState != WebSocketState.Open) {