diff --git a/websocket-sharp/WebSocket.cs b/websocket-sharp/WebSocket.cs
index 173b6ab2..a63374e0 100644
--- a/websocket-sharp/WebSocket.cs
+++ b/websocket-sharp/WebSocket.cs
@@ -3609,7 +3609,8 @@ namespace WebSocketSharp
     /// A <see cref="string"/> that specifies the text data to send.
     /// </param>
     /// <exception cref="InvalidOperationException">
-    /// The current state of the interface is not Open.
+    /// The Send 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"/>.